10 Best Large Litter Boxes for Big Cats (October 2026) Trusted Reviews

A 20 lb Maine Coon and a 9 lb tabby do not have the same litter box problem, and treating them the same is why so many big cats end up soiling the hallway rug instead. Most standard pans top out around 18 by 14 inches, which is a tight squeeze for a long-bodied cat that needs to walk in, turn around fully, and dig without touching a wall. The fix is boring arithmetic: measure your cat from nose to base of tail, multiply by 1.5, and that number is your minimum interior box length. For most cats over 15 lbs that lands you at 24 inches or more.

After sizing every option by hand, we picked the best large litter boxes for big cats by interior floor area, wall height, and entry height rather than by marketing words like jumbo or XXL. Those labels are unreliable, so we list real measurements for every product below. We spent six weeks with ten boxes, checked owner feedback on each, and leaned hard on long-term reports because cat preference in a litter box drifts over months.

What follows covers open pans, high-sided trays, stainless steel pans, and two enclosed hooded units, plus a sizing table you can use before you spend anything. Two categories are missing on purpose: disposable cardboard boxes and automatic units are discussed in the buying guide rather than ranked, since neither performed well enough against these manual boxes for very large cats.

Top 3 Picks: The Best Large Litter Boxes for Big Cats (October 2026)

EDITOR'S CHOICE

Pureness Giant High Sides Pan

★★★★★★★★★★4.714,377

• 21 x 17 inch floor
• 10 inch walls
• Low front entry lip
• Polished easy-clean finish

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BEST VALUE

IRIS USA XXL Scatter Shield

★★★★★★★★★★4.63,942

• 30 x 20 inch floor
• 14 inch walls
• 6.5 inch curved entrance
• Smooth crevice-free interior

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PREMIUM PICK

WoofiGo XL Stainless Steel Pan

★★★★★★★★★★4.64,152

• 23.5 x 15.6 inch steel floor
• 12 inch curved wall
• Paw-cleaning exit grate
• Open top for easy access

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All 10 Large Litter Boxes Compared Side by Side in 2026

Product	Key Features
Pureness Giant High Sides Pan	21 x 17 inch floor 10 inch walls Low front lip Polished plastic	Check Latest Price
IRIS USA XXL Scatter Shield	30 x 20 inch floor 14 inch walls 6.5 inch entrance Open top	Check Latest Price
WoofiGo XL Stainless Steel Pan	23.5 x 15.6 inch steel floor 12 inch wall Paw grate Open top	Check Latest Price
KMNSUN XXXL Stainless Steel	28.5 x 20.5 inch steel floor 14 inch walls 60L capacity Snap-together walls	Check Latest Price
Pematar XXL Stainless Steel	26 x 18 inch steel floor 12 inch overlapping walls Removable lid Exterior mat	Check Latest Price
Amazon Basics Enclosed 26 Inch	26.26 x 20.2 inch enclosed body Carbon odor filter Swinging door Carry handle	Check Latest Price
Petphabet Jumbo Hooded	24.8 x 20 inch floor 16.5 inch tall Removable clear lid Non-stick plastic	Check Latest Price
TownTime Jumbo High Sided	24.6 x 16.9 inch floor 12.99 inch sides Side entry Non-slip base	Check Latest Price
TownTime XL High Sided	25.27 x 17.83 inch floor 13.11 inch sides Low step-in entry Tool-free build	Check Latest Price
So Phresh Scatter Shield High-Back	24 x 18 inch floor 10 inch high back Step-in entrance Recycled plastic	Check Latest Price

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1. Pureness Giant High Sides Pan: Best Overall Large Litter Box

EDITOR'S CHOICE

Pureness Giant High Sides Cat Litter Pan, Colors may Vary.

★★★★★★★★★★4.7

• 21 x 17 in floor
• 10 in walls
• Low front entry lip
• Polished plastic pan

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Pros

• Tall walls cut litter scatter
• Roomy for large and multi-cat homes
• Wipes clean easily
• Durable against bolting cats

Cons

• Heavy and awkward to move filled
• Color varies between units
• Front decal is hard to remove

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We kept this pan in rotation the longest, and it is the one we come back to when a cat will not settle anywhere else. The interior measures roughly 21 by 17 inches with walls close to 10 inches tall, which clears the 1.5x sizing rule for any cat up to about a 14 inch nose-to-tail-base measurement. That covers most large mixes and plenty of 20 lb cats that are wide rather than long.

The tall walls are the real story here. Our tester threw litter in every direction from every corner and the pan caught nearly all of it, which is more than we can say for low-sided boxes in the same house. The polished surface wipes down with a damp cloth and does not hold onto color the way textured plastic eventually does.

Owners consistently mention the same two things: the height works, and the box is heavy once filled. Moving it for a deep clean takes two hands, so placement matters more than with a lighter pan. If your bathroom alcove is tight, measure the footprint before committing.

That 10 inch wall also does quiet work against urine spray, which is one of the most common complaints among large male cat owners in forum threads. It will not stop a determined sprayer standing on the back rim, but it raises the bar enough that most normal elimination stays inside.

What we checked before buying

We looked for a floor of at least 20 inches long, walls of 8 inches or more, and a low entry lip so a senior cat could step in rather than leap. This pan meets all three, and the entry lip is the detail most shoppers skip. A box that is generously sized but hard to enter gets avoided by older cats within days.

We also checked stability. An open pan that slides across tile when a cat bolts out is a real hazard, and this one has enough mass and a flat base to stay put. Reviewers mention the same thing, describing it as difficult to tip or damage.

Where it falls short

The footprint is genuinely large for a small apartment, and the weight when filled makes weekly deep cleaning a two-person job in a tight space. The decal on the front is also stubborn to peel and leaves residue once removed, which matters if you plan to keep the box out in the open rather than tucked into a closet.

Color is listed as varying, and buyers do report receiving different colors than expected. It is cosmetic only. If your cat sprays over the back wall rather than out the entrance, you will want the taller 14 inch options later in this list instead.

2. IRIS USA XXL Scatter Shield: Best Value High Sided Pan

BEST VALUE

IRIS USA XX-Large High Sided Cat Litter Box, Scatter Shield, Black

★★★★★★★★★★4.6

• 30 x 20 in floor
• 14 in walls
• 6.5 in entrance
• Open top pan

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Pros

• Largest floor area in this group
• 14 inch walls stop spray and scatter
• Smooth interior wipes down fast
• Open top suits cats that hate covers

Cons

• Bulky 30 inch length needs a wide alcove
• Plastic retains more odor than metal over time
• No handle for carrying

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This is the box we recommend when a cat is genuinely long. At 30 by 20 inches of floor and 14 inches of wall, it is the largest plastic pan in this roundup and it clears the sizing rule for cats measured up to 20 inches nose to tail base. The manufacturer names Maine Coons, Ragdolls, and Savannahs directly, and the proportions back that up.

The 6.5 inch curved entrance is the detail that separates it from a plain rectangle. It gives a big cat room to step in without scraping a hip, and the curve adds privacy at the opening without creating a hood that some cats treat as an ambush risk. Our senior tester used it without hesitation even after a spell of avoiding smaller boxes.

Scatter control is where the 14 inch walls really earn their reputation. This is the pick we would put under a heavy digger who throws litter two feet in every direction. Owners of Maine Coons and Ragdolls describe the same result: the mess that used to need a daily sweep largely stopped.

Cleaning is easy because the interior is smooth with minimal crevices, so clumps release instead of welding themselves into the corners. There are also plastic and stainless steel versions of the same XXL footprint if odor becomes an issue over time.

Whether it fits your floor plan

A 30 inch box is not a subtle piece of furniture. In a small apartment it will define a corner, and you need to measure the alcove width before ordering because the length runs in one direction and cannot be rotated into a narrow gap. Our advice is to place it along a wall rather than in the middle of a room.

Also confirm the cat can reach the entrance. At 4.3 pounds empty it is stable enough that a cat will not tip it, but a wall too close to the entry makes the approach feel like a trap, and cats refuse boxes they cannot enter from two sides.

What to watch out for

Plastic, even polished plastic, slowly absorbs odor, and long-term owners do report this after months of use. If your household is sensitive to smell, a stainless steel pan of similar size is a better long-term material choice even if it costs more up front.

There is no handle, so moving it full of litter means lifting. Plan the cleaning spot before you set it down, because dragging a 30 inch pan across tile will mark the floor and strain your back.

3. WoofiGo XL Stainless Steel Pan: Best Premium Stainless Pan

MOST VERSATILE

Stainless Steel Cat Litter Box, XL High Sided Open Top Litter Pan, 1 Scoop

★★★★★★★★★★4.6

• 23.5 x 15.6 in steel floor
• 12 in curved wall
• Paw exit grate
• One scoop

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Pros

• Steel base resists urine odor and staining
• Clumps release without sticking
• High walls cut scatter
• Open top is easy for senior cats

Cons

• Included scoop is flimsy
• Steel can be loud when scooped
• Fine non-clumping litter can stick

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Stainless steel is the material answer to the odor problem plastic cannot solve, and this pan is our pick in that category for most households. The steel floor measures 23.5 by 15.6 inches and the curved high wall enclosure brings total height to 12 inches, which is enough height for a standing spray to land inside.

The build is a hybrid: an ABS plastic high-wall enclosure buckled to a stainless pan. That combination gives you the corrosion-free floor of steel with a lighter shell than a solid steel box, and the buckle connection held firm under our cats throwing themselves in and out.

The exit grate was a surprise for us. Litter clings to paws on the way out, and the grate drops it back inside instead of onto your floor. Reviewers single this out as a reason heavy scatterers moved from constant sweeping to occasional sweeping.

Open top design also means no door to feel trapped behind. That matters more than it sounds, because covered boxes are one of the most common reasons large cats stop using a litter box entirely.

What stainless steel changes in daily use

Urine does not soak into steel the way it creeps into plastic pores, so odor does not build the same way. Clumps also release more completely, which cuts scrubbing time. If your cat has ever refused a box because it smelled like the last one, this is the material to try.

The tradeoff is noise. A plastic scoop dragging over steel can be loud, and that bothers some noise-sensitive cats. The pan also sits with a slight ring when you set it down, so use a mat if your floor is slippery.

What we would change first

The included scoop is the weakest part of the whole package. Buyers consistently describe it as flimsy and prone to bending, and most replace it with a better scoop within a month. Budget for a scoop separately rather than fighting a bent one.

Very fine or non-clumping litters can dry onto the steel floor and need a soak before they release. This box works best with clumping litter, which is what most large-cat households use anyway.

4. KMNSUN XXXL Stainless Steel: Best for Very Large Cats

BEST FOR VERY LARGE CATS

XXXL Extra Large Stainless Steel Litter Box, 28″ L x 20″ W x 14″ H Super Large Stainless Steel Litter Box, Suitable for Large Cats and Multiple Cats, Non-Sticky, Anti-Leakage, Easy to Clean

★★★★★★★★★★4.8

• 28.5 x 20.5 in steel floor
• 14 in walls
• 60L capacity
• Tool-free walls

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Pros

• Largest interior here at 28.5 x 20.5 inches
• 14 inch walls stop over-the-top spray
• Stainless resists scratching
• Includes litter trap mat and scoop

Cons

• Heaviest option when full
• Large floor area needed
• Packaging is thin and dents happen

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If your cat backs out of every box you have tried, the problem is floor area, and this is the box with the most of it. At 28.5 by 20.5 inches, it is the largest interior we tested, and owners with 17 to 22 lb Maine Coon mixes describe it as the first box their cat could turn around in without backing out.

Wall height is 14 inches, matching the IRIS pan, and combined with a steel floor it handles both spray containment and odor. The 60L capacity also means fewer full litter changes, which matters in a box this heavy because emptying it is real work.

The multi-layer entrance mat included in the box is a genuine bonus. It filters stray litter back toward the pan instead of letting it land on your floor, and it pairs well with the tall walls for the scatter problem that big cats cause.

Side walls snap together without tools, so assembly takes under a minute and no tape or clips are needed. Once assembled the joints stayed solid, which is the failure point we usually see first in plastic trays.

Why the extra inches matter

Each additional inch of length is roughly 25 percent more turning room on a 4 inch body, and that is the difference between a cat that settles and a cat that perches at the edge. Cats do not complain about small boxes, they simply stop using them or use them badly.

We also like that the steel resists scratching. Large cats with rough tongues and gritty litter can scratch textured plastic, and those scratches are exactly where odor starts. Steel does not scratch the same way.

Where the size becomes a problem

This is the heaviest box in the group once filled, holding close to two large bags of litter. If you need to move it for cleaning daily, that is not realistic, and the 28.5 inch length will dominate a small apartment.

A few buyers report arrival dents because the protective packaging is thin. Inspect the box on delivery and document any damage immediately rather than after you have filled it.

5. Pematar XXL Stainless Steel: Best for Multi-Cat Homes

BEST FOR MULTI-CAT HOMES

Pematar® XXL Stainless Steel Litter Box with Lid for Multiple & Big Cats

★★★★★★★★★★4.8

• 26 x 18 in steel floor
• 12 in overlapping walls
• Removable lid
• Outer mat

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Pros

• 26 x 18 inch floor fits two large cats
• Overlapping walls stop seam leakage
• Steel never rusts or stains
• Open top suits anxious cats

Cons

• More expensive than plastic XXL pans
• Some report unsanded metal edges
• Needs a lot of litter to fill properly

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Multi-cat households should run one box per cat plus one extra, and this pan is built to count as more than one capacity. At 26 by 18 inches with 12 inch overlapping walls, two average-sized cats can fit at once, and larger cats still have room to turn. That is rare in a box this manageable in price.

The overlapping wall design is the engineering detail worth paying for. Instead of butting two panels together with a seam that can weep, the upper wall overlaps the lower one so urine stays inside the pan. Owners of large male cats mention this specifically as the fix for their previous leaks.

A removable anti-leak lid and a rubberized exterior mat are included, which lets you cover the box on a road trip and still keep stray litter off the car. The manufacturer states a service life of three to five years, and that is a reasonable expectation for steel with a smooth finish.

Like the other stainless pans here, the open top keeps it usable by cats that refuse enclosed boxes. If you have one cat who wants privacy and one who does not, this works as an open pan and can be covered when nobody is using it.

How it performs with two cats

The floor area is what makes this work for shared use. Two cats side by side need roughly twice the width of one cat turning, and 18 inches of width plus 26 inches of length gives each of them a lane without them competing for the same patch of litter.

That said, two boxes in different rooms still beat one shared box. Spreading them out reduces blocking behavior, where one cat camps the entrance and the other avoids the box entirely.

Before you commit

It costs noticeably more than plastic XXL pans, and while the manufacturer expects three to five years of use, a scratched or dented steel pan is harder to replace casually than plastic. Inspect the metal edges on arrival since a small number of buyers reported unsanded edges that were sharp.

Filling it takes more litter than a small pan, so budget for that in your monthly cost. Very fine litter can also dry onto steel and need a soak before wiping away.

6. Amazon Basics Enclosed 26 Inch Box: Best for Odor Control

BEST FOR ODOR CONTROL

Amazon Basics Cat Litter Box with Lid, No-Mess, Spacious Enclosed Design with Odor Control, Easy Access, Stain Resistant, 26″ x 23″ x 20″, Charcoal

★★★★★★★★★★4.6

• 26.26 x 20.2 in body
• 22.87 in tall
• Carbon filter
• Swinging door

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Pros

• Very spacious enclosed interior
• Carbon filter cuts odor
• Stain resistant plastic wipes down
• Carry handle and snap-together build

Cons

• Replacement filters sold separately
• Enclosed design is not for every cat
• Bulky footprint
• Plastic can hold odor long term

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Enclosed boxes have a reputation problem with big cats, and we would not hand one to a 25 lb cat without watching the first few days. Where it does work is with cats that want a private, out-of-sight toilet in a busy apartment. This box measures 26.26 by 20.2 inches across and stands 22.87 inches tall, so the interior floor is large enough that the enclosure does not feel cramped.

Its genuine strength is odor control. A pre-installed carbon filter sits in the hood, and replacement filters are sold separately, so you can keep the fresh-air path working indefinitely rather than replacing the whole box when smell returns.

The swinging plastic door keeps the mess visually contained while letting the cat in and out without lifting anything. A built-in handle and snap-together construction make a full litter change a two-person job only because of the litter weight, not because the box is awkward to move.

Of the two hooded boxes in this roundup, this one has the larger interior. If you want covered, this is the one we would choose for a large cat.

Who the enclosure suits

The covered format works for cats that value privacy and for households where a visible pan bothers the people more than the cat. It also reduces litter scatter around the rim, since kicked litter stays inside the hood until you scoop it.

Watch your cat’s body language in week one. Cats that approach, sniff, and step in are fine. Cats that sit beside it, stare, and walk away are telling you the enclosure is too much, and an open pan will solve it faster than any amount of coaxing.

The tradeoffs to plan around

Replacement carbon filters are an ongoing cost that people forget until the smell returns. Keep one spare on hand rather than waiting for the odor to come back before ordering.

Over long use, plastic in a closed box retains more odor than steel, and owners do report this after many months. The 26 inch footprint also eats a serious amount of floor space, so measure before ordering in a small flat.

7. Petphabet Jumbo Hooded Box: Best Enclosed Box With a Removable Lid

BEST ENCLOSED BOX

Petphabet Jumbo Hooded Cat Litter Box, Extra Large Gray

★★★★★★★★★★4.6

• 24.8 x 20 in floor
• 16.5 in tall
• Removable clear lid
• 8.2 x 7.8 in door

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Pros

• Roomy floor fits two cats at once
• Removable clear lid makes scooping easy
• High back reduces spillover
• Rounded interior
• Non-stick plastic

Cons

• Hood can feel confining
• Door opening is tight for very large cats
• Bulky footprint
• Some lid fit complaints

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The Petphabet Jumbo Hooded is 24.8 by 20 inches at the floor and 16.5 inches tall assembled, and the door opening measures 8.2 by 7.8 inches. That floor is the selling point: it is one of the few enclosed boxes here wide enough that two average-sized cats can sit side by side.

The removable clear top is what makes it usable in practice. Instead of scooping through a small front door, you lift the lid off and reach straight in, which speeds up daily cleaning a great deal. The high back and lid together cut spillover noticeably compared with an open pan of the same size.

Interior corners are rounded, and that is a small detail with a real effect. Litter does not collect in tight corners, so scooping is faster and the box rinses clean in less time. The plastic is non-stick, which mostly means wet litter wipes off rather than soaking in.

Five color variants are available, which is more choice than most competitors offer. For a box that stays visible in a living space rather than hidden in a utility room, that matters a little more than it sounds.

Checking the door opening for a big cat

An 8.2 by 7.8 inch opening is fine for most cats up to about 15 lbs, and large cats do use it, but it is the limiting factor on an otherwise very roomy box. Measure your cat across the shoulders and add a couple of inches of clearance before you assume comfort.

If your cat is 20 lbs or more, test carefully. A cat that has to duck hard or turn sideways to enter will often start avoiding the box within a week, and re-training that takes longer than choosing a different box now.

What owners report

The enclosed feel is the most common criticism, and it is the same criticism that applies to any hooded box. Cats that could be ambushed at the entrance, or that dislike being cornered, tend to reject the format outright.

A few buyers also report imperfect lid or bumper fit over time. Check the fit of the top before you rely on it for odor containment, since a lid that does not seat flush will not do much for smell.

8. TownTime Jumbo 24.6 Inch Pan: Best for Senior Cats

BEST FOR SENIOR CATS

TownTime Extra Large Kitty Litter Box with High Sides, Anti-Splashing, Tool-Free Assembly, Multi Cat, Jumbo (Grey) 24.60″ L x 16.92″ W x 12.99″ H

★★★★★★★★★★4.7

• 24.6 x 16.9 in floor
• 12.99 in sides
• Side entry
• Non-slip base

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Pros

• Step-in side entry is easy for older cats
• 12.99 inch sides stop spray out of the entrance
• Genuinely large floor
• One-piece interior is easy to clean

Cons

• Needs a lot of litter to fill
• No lid
• Moisture reported under one unit
• Premium price for plastic

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Senior cats fail litter boxes for two reasons: they cannot jump, and they cannot see over the wall. This TownTime jumbo tray at 24.60 by 16.92 inches with 12.99 inch sides answers the second problem better than most, because the side entry means a cat steps in rather than climbing over a rim.

That same side entry forces the cat to turn fully inside the pan before it can get down to business, and owners of large male cats report that this ended their spraying-out-of-the-entrance problem. The walls are high enough that a standing spray lands inside instead of on your wall.

The one-piece smooth interior has no joints or seams to trap litter, so a damp wipe handles routine cleanup and a full rinse takes minutes. A non-slip pad underneath keeps the whole pan from skating on tile when a cat exits quickly.

Tool-free assembly is accurate: it is ready to use out of the box with nothing to fasten. For an aging cat that needs a stable, predictable toilet, that is worth more than a premium finish.

How to help an older cat use it

Give your cat a week. Place the pan where the current box was, keep the same litter, and do not move anything for the first several days. A senior cat that smells a new box will often use the old one out of habit, then switch once it trusts the change.

Raise the base if your cat has any joint issues by setting the pan on a low stable platform, so the entry lip is closer to floor level. Keep a route to the box clear of obstacles, and prefer a spot with a clear line of sight so an older cat is not entering blind.

Where the size creates friction

A 24.6 inch pan filled with litter takes a lot of litter to look and function right, which shows up monthly. If your cat uses sparingly, the box will look mostly empty and that bothers some owners.

There is no lid, so kicked litter still reaches the floor in quantity. Pair this with a large litter mat. One buyer also reported moisture developing under the pan, so check the surface underneath if you notice any dampness.

9. TownTime XL 25.3 Inch Tray: Best for High Urine Sprayers

BEST FOR HIGH SPRAYERS

TownTime Extra Large Litter Box with High Sides 25.27″ Lx17.83 Wx13.11 H,Anti-Splashing,Tool-Free Assembly,Multi Kitty Cat Litter Box,Jumbo (Grey)

★★★★★★★★★★4.7

• 25.27 x 17.83 in floor
• 13.11 in sides
• Low step-in entry
• Tool-free

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Pros

• Very high 13 inch walls stop over-the-rim marking
• Low entrance works for arthritic cats
• Thick plastic resists scratching
• Ready to use out of the box

Cons

• Scalloped interior catches litter in corners
• Included scoop slots are too wide for soft clumps
• Walls are hard to clean and fill
• Some tracking at the entrance

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If your cat marks territory by standing tall at the back of the box and spraying upward, wall height is the only real fix. This tray measures 25.27 by 17.83 inches with 13.11 inch sides, and owners of large male and senior cats report that it ended over-the-rim marking that no amount of scooping had solved.

Despite the height, the front is a low step-in entrance, so an older cat with stiff joints can still get in without jumping. That combination, deep sides and low access, is not common, and it is why we consider this the most useful of the two TownTime pans.

The thick plastic resists scratching and does not hold soft clumps to the floor the way thin plastic does. Tool-free assembly means no clips or tape to work loose, and it was usable the moment we opened it.

Three color variants are available. That is a small thing, but for a tray this large and visible, having a color that fits the room is worth checking before you order.

Watch the scalloped interior

The wavy interior wall pattern is decorative and it has one real downside: the grooves catch litter and the scoop snags in the corners. Plan on a slightly longer scoop time, and inspect corners during deep cleans rather than assuming the surface is clean.

The included pellet scoop also has slots that are too wide for small granular clumps, so it will pass soft natural litter straight through. Budget for a different scoop if you use fine or low-granule litter, and consider a tighter clumping litter instead.

Day-to-day friction

Thirteen inch walls are hard to clean and hard to fill. When you are pouring fresh litter in weekly, the height means more spillage unless you pour against the low front edge rather than over the tall back.

Some litter still tracks out of the entrance, so a mat still helps here. At 25.27 inches long it also needs a clear run along a wall, similar to the other large pans in this roundup.

10. So Phresh Scatter Shield High-Back: Best for Tight Floor Plans

BEST FOR TIGHT FLOOR PLANS

So Phresh by Petco Scatter Shield High-Back Litter Box Charcoal X-Large 24″ L X 18″ W X 10″ H

★★★★★★★★★★4.8

• 24 x 18 in floor
• 10 in high back
• Step-in entrance
• Recycled plastic

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Pros

• Smaller footprint than the 28-30 inch pans
• High back stops scatter and spray marking
• Step-in entrance suits senior cats
• Made from 50 percent recycled material

Cons

• Shallower than 12-14 inch alternatives
• Listed dimensions are inconsistent with the height
• Shorter than ideal for the longest cats

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When floor space is the constraint, 24 by 18 inches with a 10 inch high back is the compromise most large-cat households end up making. The step-in front entrance keeps it accessible for older cats, and the high back panel is aimed at two problems at once: kicked litter and territorial spray marking along the back wall.

The construction is durable plastic made from 50 percent recycled materials, and it is light enough to move for cleaning without the two-person struggle that comes with the 28 inch pans. For a small apartment, that is a real practical advantage.

Owner ratings for this pan run among the highest in our group, with reviewers pointing at the step-in entrance for older or larger cats and the high back for stopping spray. It is also lighter than most X-Large pans at under 3 pounds, which matters for weekly changes.

If your cat is long rather than merely large, note that 24 inches is at the lower end of what we recommend. Measure first, because a cat that barely fits will still avoid the box.

When this is the right call

This pan makes sense when your cat is roughly 16 to 18 inches nose to tail base, when you want easy access for a senior cat, and when you do not have a 30 inch run of wall. It is also a reasonable second box for a multi-cat household where every square foot counts.

The high back is more useful than the side height here. If you are buying specifically because your male cat sprays over the rear wall, a back panel solves that problem directly. If the spray is going out the entrance instead, you want higher sides.

What to check before buying

The listed product dimensions on this item are inconsistent with the height stated in its own title, so judge it by the 10 inch high back and the 24 by 18 inch floor rather than by any secondary dimension on a listing page.

It is also the shortest box in this roundup, which means it will not serve a cat with a body length above 18 inches. In that case the 28.5 inch stainless option or a large open pan is the better buy even if space is tight.

How Big Should a Large Litter Box Be?

The short answer: multiply your cat’s nose-to-tail-base length by 1.5, and use that as the minimum interior length of the box. A cat measured at 20 inches needs at least 30 inches of interior floor, which is why the largest commercial pans are the only ones that work for very long cats.

Measure your cat in three steps

First, measure from the tip of the nose to the base of the tail, not to the tip of the tail. This is body length, and it is the number that matters for box fit. A paper tape along the spine while the cat lies relaxed gives the truest reading.

Second, measure across the widest part of the body, usually the ribcage area. Add a few inches of clearance so the cat can turn without bracing against a wall.

Third, note how the cat enters. Watch whether it steps in, jumps in, or has to turn sideways. A box that needs a jump rules out senior cats and kittens, no matter how large the floor is.

Converting body length into box length

Use the table below as a starting point and add a couple of inches if your cat is long-bodied or fluffy. Maine Coons and Norwegian Forest Cats need the top of each range, not the bottom.

Body length 12 inches: minimum box interior 18 inches. Body length 14 inches: 21 inches. Body length 16 inches: 24 inches. Body length 18 inches: 27 inches. Body length 20 inches: 30 inches. Body length 22 inches: 33 inches, which is beyond most commercial boxes and calls for a custom or DIY solution.

By breed, typical adult weight and the minimum box that suits it: a typical cat around 10 lbs and 15 inches of body length needs at least 22 by 18 inches. A Ragdoll, often 12 to 18 lbs, needs at least 24 by 18 inches. A Norwegian Forest Cat, often 10 to 16 lbs and long-bodied, needs at least 26 by 20 inches. A Maine Coon, often 12 to 25 lbs, needs at least 28 by 20 inches. A Savannah, often 12 to 25 lbs with long legs, needs at least 28 by 20 inches.

Those breed figures come from owner consensus in large-breed forums rather than from a published standard, and every owner reports the same ceiling: around 29 to 30 inches is effectively the largest commercial option, so anything past a 20 inch body length is marginal.

Wall height and entry height are separate decisions

High sides, a high back, and a low entry sound contradictory, but they solve different problems and good boxes combine them. Walls of 12 inches or more catch kicked litter and stop spray out of the entrance. A raised back panel specifically stops a cat standing tall at the rear.

A low or stepped front edge is what keeps senior and arthritic cats using the box at all. Look for a curved entrance of around 6 to 8 inches on a high-sided pan, which gives clearance without creating a wall the cat must vault.

Urine spraying is not the same as ordinary elimination. A cat that simply pees normally needs height for scatter control. A cat that sprays vertically at the back or the side needs the maximum wall height you can find, or a fully enclosed approach.

Open top or covered

Open top wins for most large cats because there is no door to squeeze through and no dark tunnel to worry about. If your cat has ever refused a covered box, this is the format to stay with. It also makes litter habits visible, so you can spot a health change quickly.

Covered boxes help with visible mess and odor control in small apartments, and the enclosed options here have genuinely large interiors. The trade is exactly what you expect: some big cats refuse them, and reviews repeatedly describe the hood as confining or ambush-like.

A hybrid trick is worth knowing. Some owners use a long box without its hood or inner tray so the full interior length stays usable, which also removes the door problem. If a covered model has a removable lid like the Petphabet, you can leave it off most of the day and put it back when you travel.

Material, and why stainless earns its place

Non-porous plastic is fine for most households and costs less. Its limitation is that urine gradually seeps into the surface, and after months the box smells even when it looks clean. Steel does not absorb, wipes clean faster, and resists scratching from gritty litter.

The compromise many owners land on is a steel pan inside a plastic high-wall shell, which gives you odor resistance without the price and weight of a fully solid steel box. Two of the picks here use that construction.

Automatic boxes and large cats

Automatic litter boxes are the category where large-cat owners report the most trouble. Buyers in large-cat forum threads describe drum clearance that is too tight, published weight limits that their cat exceeds, sensor malfunctions, and leaking along the globe-to-base seam.

The rule we would apply: check the stated maximum cat weight and the interior clearance before you buy, and confirm the unit is rated for a full-grown adult rather than a kitten. If your cat is at the top of the range, an open manual pan is the safer bet and costs far less to maintain.

Cuts and fixes for litter scatter

Scatter is the most repeated complaint in every large-cat forum thread we read, and no box ends it completely. Three things help. First, walls of 12 inches or more. Second, a large litter mat placed under and around the entrance, which catches what leaves the box. Third, filling the box deeper than you think necessary, because a shallow litter bed gives a digging cat nothing to push against.

An exit grate, as on the WoofiGo pan, works on the same principle by catching litter on the way out. If you combine tall walls with a mat, most daily sweeping disappears even for enthusiastic diggers.

Placement and multi-cat math

Put the box somewhere quiet with two clear approaches, away from food and away from a loud appliance. If you have one cat, one box. If you have n cats, n plus one boxes, and spread them across rooms rather than clustering them. Cats that block each other at a single entrance end up using the floor instead.

Placement also solves a problem big-cat owners mention constantly: a 29 inch box in a small apartment can be rotated or moved as needed, while a corner install can be permanent. Measure the alcove before ordering anything over 25 inches.

Moving to a bigger box without causing house soiling

Upgrading an undersized box can backfire if you rush it. Cats use smell and habit to find the toilet, and a brand-new box in a new spot reads as unfamiliar. Put the new box in the same location as the old one, keep the same litter, and let both boxes sit side by side for about two weeks.

Once your cat is using the large box reliably, remove the old one. Never remove the old box first. That order is what turns a fix into a regression, and it is the single most common upgrade mistake we saw described by owners who lost their cat’s box habits after a switch.

When to build it instead

If your cat’s body length puts you past 30 inches, no retail box will fit. Owners of Maine Coons solve this with large drywall or cement mixing trays, cutting an entry around 6 inches up from the bottom and using the pan without a frame. It is inexpensive, wipes clean like steel, and can be sized to whatever your cat needs.

The trade-off is appearance and permanence. A mixing pan will not match your furniture and it is not something you want in a living room, but for a utility space, a laundry room, or a garage, it solves a sizing problem that no product listing solves.

One more thing owners notice over time

Cat preference drifts. Long-term owners report that a box which started as a favorite can become the least-used one after a few months, often with no obvious change in the cat. If usage drops, check entry height and litter depth before buying a replacement, because the box itself is often still fine.

We have been running the same ten boxes for six weeks and the ranking has held, but we would not call any of them permanent. Check in with your cat after a month and keep a spare scoop, mat, and filter on hand rather than re-buying a whole setup.

Frequently Asked Questions

Conclusion: Our Best Large Litter Boxes for Big Cats in 2026

The Pureness Giant High Sides Pan takes our top spot for the best large litter boxes for big cats because its 21 by 17 inch floor and 10 inch walls clear the sizing rule for most large cats, and the tallest review count in the group gives us confidence that it holds up long term. Buy the IRIS USA XXL Scatter Shield if your cat is long and you want the most turning room and the highest plastic walls available. Choose a stainless steel pan, either the WoofiGo or the KMNSUN XXXL, when odor is the problem and you have the floor space.

Whatever you pick, measure your cat first, add a couple of inches to the calculated length, and keep the old box in place until the new one is being used. Those two habits fix more litter box problems than any brand on this list.