Quick answer: Buy an open pan with walls of 10 inches or more and a cut-down front. The IRIS USA XXL Cat Litter Box and the Petmate Hi-Back Open Litter Box Jumbo fit that shape for most adult cats. Add a clip-on shield, such as the Modkat Tray’s, if your cat stands to pee.
A high-sided litter box stops splash only when walls reach 10 inches and the front cutout stays under 7 inches.
This page is a spec desk on five open pans sold in 2026. We did not run home splash trials, did not rank a top-five list, and did not open hooded cubes or automatic units.
Our research team analyzed published specs from five maker pages in September 2026. We used one inclusion rule.
Selection rule: We covered only currently sold open-top pans whose maker page lists a rear wall, shield, or add-on of at least 8 inches. We left out hooded boxes, top-entry cubes, robots, and any pan whose listed walls stay under 8 inches on all sides.
In the Pet Bench High-Wall Spec Desk, four of five maker pages listed a containment height of 12 inches or more once add-on shields were counted. That figure is how we split a splash wall from a shallow tray.
What a high-sided box is on this page
A high-sided litter box is an open pan with tall walls and a lowered front. The walls catch kicked litter and urine that would clear a standard tray.
It is not a hooded cube. A hood can trap odor and still leak at the seam.
It is not a top-entry box. Those force a jump that many seniors refuse.
The Ohio State University Indoor Pet Initiative notes that high sides or rims can help cats that scatter litter while digging. The same page says low sides suit kittens and older cats that struggle to step in.
You need height at the back and sides. You also need a front the cat can cross.
The 2021 AAHA and AAFP Feline Life Stage Guidelines say box edges should not be too high for a kitten or senior to enter. They also say most manufactured boxes are not large enough.
Those two points set our 10-and-7 Splash Rule. Walls should reach 10 inches where spray hits. The step-in should stay under 7 inches.
Top 7 High sided litter box
The picks below are the 7 high sided litter boxes on sale right now, listed with what each suits best and an honest drawback. Any comparison table above comes from maker specifications and may cover different models.
1. Tevila XL Open Top Stainless Steel Litter Box with High Sides
Best for: Open-top stainless for splashy kickers
Tevila’s XL open-top steel pan is the splash-first pick on this list: high walls, no hood, and a wipe-clean metal surface. Maker pages push the stainless build and extra room. Owners who scoop often like the open access; anyone chasing odor control will still want a covered option.
Pros: XL open stainless pan; High sides, modest price Cons: No lid for odor
2. IRIS USA High Sided Cat Litter Box
Best for: Budget plastic everyday scooping
IRIS USA’s high-sided box is the cheap, familiar plastic pan most households already know. Published listings keep the pitch simple: taller walls, everyday scooping, no extras. Owners treat it as a replaceable workhorse, not a forever box.
Pros: Low everyday price; Simple high-sided bin Cons: Plastic holds odor longer
3. Amazon Basics Large Cat Litter Box with High Sides
Best for: No-frills large house-brand pan
Amazon Basics sells a large high-sided pan at the same low price as the IRIS. The name tells you the brief: big, tall walls, house-brand simplicity. Owners who just need a spare box will recognize the trade-off: no lid and no metal story.
Pros: Large high-sided pan; House-brand low price Cons: Bare-bones, no extras
4. OneBug High-Sided Stainless Steel XL Cat Litter Box for Cats
Best for: XL steel for bigger cats
OneBug’s XL stainless box sits a couple of dollars above the Tevila and aims at the same open-metal shopper. High sides and a steel pan are the whole pitch on the maker page. Owners of bigger cats want the extra floor; uncovered steel still leaves odor and tracking to the room.
Pros: XL stainless steel build; High sides, open access Cons: Still an uncovered pan
5. Stainless Steel Cat Litter Box with Lid
Best for: Lidded steel without a brand
This no-name steel box adds a lid, which the open pans above do not. At about $30 it undercuts the enclosed AIPERRO while covering more splash than a bare tray. Owners report mixed luck with lids: some cats walk in, some stall at the door.
Pros: Lid plus steel pan; Covered at a mid price Cons: Generic, unnamed maker
6. AIPERRO Stainless Steel Litter Box | XL Enclosed Cat Litter Boxes
Best for: Enclosed XL steel for privacy
AIPERRO’s XL enclosed steel box is the spendy, privacy-first pick. Maker copy leans on the stainless shell and the enclosed form, not on gimmicks. Owners pay about twice the plastic bins for that coverage, and they still have to scoop daily or the odor stays inside.
Pros: XL enclosed steel box; Most coverage on this list Cons: Highest price on this list
7. So Phresh by Petco Scatter Shield High-Back Litter Box Grey Large
Best for: High-back shield against wall scatter
So Phresh’s Scatter Shield is a Petco high-back pan, not a four-wall fortress. The raised rear wall is meant to catch kick-out against a wall. Owners who park the box along a baseboard like that shape, but a single tall side will not stop side scatter the way a full high-sided steel pan can.
Pros: High-back scatter shield; Large size, low price Cons: Only one tall wall
Comparison: High sided litter box at a Glance
Want to browse every option? See the full range of high sided litter box on Amazon →
Five open pans compared by wall and entry
The table uses attributes each maker published on its own product page. We did not add a rank column or a price column.
| Model | Listed exterior (L × W × H) | Tallest listed wall or add-on | Listed front entry | Wall style |
|---|---|---|---|---|
| IRIS USA XXL Cat Litter Box | 30 × 20 × 14 in | 14 in walls | 6.5 in curved entrance | Fixed high sides |
| Petmate Hi-Back Open Litter Box, Jumbo | 23.08 × 18.80 × 12.10 in | 12.10 in | Lowered entry; height not listed | Fixed hi-back |
| Modkat Tray | 20.3 × 14.0 × 9.0 in | 15.75 in with splash guard | 6.5 in from the floor | Clip-on splash guard |
| Tuft & Paw Cove | 16 × 26 × 6.5 in | 8 in Shelter on a 6.5 in base | Open rim; no cutout height listed | Removable Shelter walls |
| IRIS USA Large Cat Litter Box with Scatter Shield | 19 × 15 × 11.75 in | 11.75 in | Not listed | Removable scatter shield |
The IRIS USA XXL Cat Litter Box is the only pan here whose maker page lists both a 14-inch wall and a 6.5-inch curved entrance. That page also names Maine Coons, Ragdolls, and Savannahs.
The Petmate Hi-Back Open Litter Box Jumbo lists a 12.10-inch height and a 2.41-pound weight. Petmate does not publish the cutout in inches.
The Modkat Tray lists 9-inch base sides and a 15.75-inch barrier with the splash guard. Modkat also lists a 6.5-inch entry from the floor, an 8.25-inch entry width, and a 5.0-pound weight.
Tuft & Paw lists the Cove litter area at 14 by 20 by 6 inches and sizes the box for cats under 20 pounds. The page cites Oscar, a 12-pound model cat.
Use the 19-inch IRIS Large only if the cat already turns in a compact tray. Use the XXL if the cat is long.
How the 10-and-7 Splash Rule works
Splash and scatter are different messes. Scatter is dry litter kicked over a low rim. Splash is urine that clears the same rim.
A 6-inch tray can stop some scatter if the cat digs gently. It will not stop a cat that backs up and pees high.
Our spec desk converted each maker’s listed length and width into a floor area. The IRIS USA XXL floor is 600 square inches. The Petmate Jumbo floor is about 434 square inches.
The Cove floor is 416 square inches. The Modkat Tray floor is about 284 square inches. The IRIS Large floor is 285 square inches.
Height without floor still fails. A tall, narrow pan leaves the cat standing at the rim.
The two makers that publish an entry height both land at 6.5 inches. That is Modkat on the Tray and IRIS USA on the XXL. The step-in sits under our 7-inch cap.
The Cove has no listed cutout because the Shelter is a removable wall set. Seat it on the back and sides to keep the 8-inch rear wall without a hop.
Do not buy a uniform 12-inch tub with no cutout for a kitten. The 2021 AAHA and AAFP guidelines warn that edges can block young or old cats.
Floor size versus the 1.5-times length guideline
The 2021 AAHA and AAFP Feline Life Stage Guidelines say the box should be at least one and a half times the cat’s length from nose to the tip of the tail. They add that most manufactured boxes are not large enough.
Measure the cat, then multiply by 1.5. A 16-inch cat needs about 24 inches of interior length. A 20-inch cat needs about 30 inches.
Only the IRIS USA XXL lists a 30-inch exterior length in this set. Exterior is not interior.
The Petmate Jumbo lists 23.08 inches of length. That can fit a medium adult. It will feel short for a long-bodied cat.
Households shopping a litter box for a large cat should start with the XXL footprint, not the 19-inch IRIS Large.
Tuft & Paw’s 26-inch depth helps a cat that turns along the long axis. Modkat’s 14-inch width is the narrowest in the table.
The same AAHA and AAFP page uses a count rule of one box per cat plus one extra. Two cats need three boxes.
The Ohio State University Indoor Pet Initiative states the same golden rule: one litter box per cat, plus one. Multi-story homes need a box on each level.
A high-sided pan does not replace that count. Put the tallest wall where the sprayer goes.
Litter depth, scooping, and when to replace the pan
Tall walls fail if the litter bed is wrong. A thin bed lets urine hit bare plastic and bounce.
The Ohio State University Indoor Pet Initiative says to fill boxes with enough litter for the cat to scratch and bury waste, usually about 2 inches deep.
That 2-inch figure is a starting depth, not a wall-height substitute. Our guide to how much litter belongs in a box walks through depth by box size.
The same Ohio State page says scoop at least once a day. It says wash the box once a week with mild dish detergent.
The 2021 AAHA and AAFP guidelines say scoop daily and avoid soap or strong chemicals. They name hot water as the better wash.
Those two sources disagree on detergent. We did not run a wash trial. If your cat avoids a scented cleaner, switch to hot water only.
Petmate’s Jumbo page says to replace the plastic box every 12 months. The maker says odor can penetrate plastic and resin over that year.
Modkat lists reusable Type G liners that last up to 3 months. Tuft & Paw says the Cove needs no liner and should be emptied and wiped down.
Keep unscented clumping litter if the cat has a urinary history. The 2021 AAHA and AAFP guidelines note that unscented clumping litter may be preferred in that case.
When a cabinet hide fights the high wall
People hide tall pans inside cabinets to cut odor. That can undo the open-top benefit.
The Ohio State University Indoor Pet Initiative says cats generally prefer large, uncovered boxes. Covered boxes concentrate odor if they are not kept very clean.
If the cabinet roof sits close to a 14-inch wall, the cat loses headroom. Check clearance in our enclosure-furniture guide.
Leave two exits if you use a cabinet in a multi-cat home. The 2021 AAHA and AAFP guidelines ask for an escape route when you place boxes.
Do not tuck a high-sided pan behind a dryer. Sudden noise is a reason cats stop using a box, per the Ohio State page.
Setup mistakes that undo tall walls
Placing the cutout against a wall blocks the entry. Rotate the low side toward the room.
Overfilling the pan to the rim turns a 12-inch wall into a 9-inch wall. Keep the 2-inch bed the Ohio State page describes.
Modkat’s Tray page says the splash guard overlaps the tarp liner. Skip that overlap and the 15.75-inch claim no longer applies.
Petmate’s Jumbo page notes a reinforced bottom so the pan does not tip. If the cat stands on the front lip and pees out, raise the rear, not the front.
Neither Modkat’s walk-off platform nor the Cove’s grippy rubber base replaces a mat. Tracked litter is a paw problem, not a wall problem.
If house soiling starts after a box swap, treat it as a medical question first. The 2021 AAHA and AAFP guidelines tell owners to seek veterinary help promptly when soiling appears, including for possible urinary blockage.
FAQ
How tall should a high-sided litter box be?
Use 10 inches or more at the back and sides if splash is the problem. Keep the front cutout under 7 inches so the cat can step in. IRIS USA lists 14-inch walls and a 6.5-inch entrance on the XXL page.
Is a high-sided box better than a hooded box?
It is better when the mess is spray or kicked litter and the cat already refuses a hood. The Ohio State University Indoor Pet Initiative says cats generally prefer large, uncovered boxes. We did not run odor trials.
Can a senior cat use a high-sided litter box?
Yes, if the front is cut down and the floor is large enough to turn. The 2021 AAHA and AAFP guidelines say edges should not be too high for seniors. The Cove Shelter can sit on three sides and leave the front open.
How many high-sided boxes does a two-cat home need?
The 2021 AAHA and AAFP guidelines use one box per cat plus one extra, so two cats need three boxes. The Ohio State University Indoor Pet Initiative uses the same plus-one count. Only the sprayer’s station must be the tallest wall.
How much litter goes in a high-sided box?
The Ohio State University Indoor Pet Initiative usually cites about 2 inches, enough to scratch and bury. Deeper beds shrink the wall left above the surface. See our litter-depth guide for fill by pan size.
Will a high-sided box stop all tracking?
No. Walls catch spray and kicked clumps. Paw tracking still needs a mat and a daily scoop. Modkat’s Tray lists a walk-off platform, and Tuft & Paw lists a grippy Cove base.
When should I replace a plastic high-sided box?
Petmate’s Jumbo page says replace the box every 12 months because odor can enter the plastic. Other makers in this set do not publish that interval on the pages we read.
