IRIS Top Entry Litter Box Review: What You Should Know Before Buying?

⚡ Quick Verdict

IRIS Top Entry Litter Box Sizes: Standard vs Wide

IRIS sells two different boxes that both carry the word “Large” on the label, and that trips up a lot of buyers. The standard box is 14.75 inches wide. The wide pan measures about 16.1 inches across. The gap looks small on paper and matters more inside than the outside numbers suggest, because the standard floor is only 9.75 inches wide.

Sizes come from IRIS’s standard box listing and its wide pan listing. Amazon rounds a little differently (20.75 inches long, for example). The wide-pan floor size is listed on IRIS’s White/Black version, so treat it as the reference for the other wide colors. Prices shift, so check the buttons above.

The wide floor has about 60 percent more room than the standard one. That is the difference between a cat that can circle and dig and one that has to back in.

Which size should you buy?

• Standard: one average adult cat, a tight space, and a floor with about 21 by 15 inches to spare.
• Wide: a cat over roughly 10 pounds, two cats sharing, or a cat that already bumps the walls of hooded boxes.
• Not sure: take the wide one. Being 1.4 inches too wide costs you a few inches of floor. Being too small costs you a cat that eliminates on the rug.

📋 How We Evaluated

Each score weighs four things: build quality, how well the lid and walls contain litter, how easy the box is to scoop and wash, and value. A good top-entry box needs sturdy plastic, a stable footprint, and a lid that lifts off fast for scooping. It also has to hold up in a multi-pet home.

Specs come from IRIS’s own listings and Amazon. Owner feedback comes from reviews on Chewy, Walmart, and IRIS’s site, plus one pet-site editor review that rated the box 3.5 out of 5 after a wobble spooked their cat. Scores are our editorial judgment, not an average of star ratings.

[ADD: one or two sentences about your own testing. How many cats, how many weeks, which litter, what you noticed first.]

Length	20.75 inches
Width	16.125 inches
Height	14.625 inches
Entry	9 by 10.5 inches

What We Found

This is the widest IRIS pan in the lineup: 20.75 inches long, about 16.1 inches across, 14.6 inches tall. The 9 by 10.5 inch oval entry is big enough that a heavy cat doesn’t have to squeeze through. Inside, the extra width gives a cat room to turn and dig without pressing against the lid, which is the complaint owners raise most about the standard size.

Litter control comes from the grooved lid. Your cat has to step across it on the way out, and the grooves knock loose granules back into the pan. The lid lifts off for scooping and washing, and the tall walls stop kicked litter from arcing over the side. The oval floor does make scooping a little awkward, and owners of the wide versions also point out that there are no handles, so a full pan is clumsy to carry.

Empty it outside or over a bag. Then wipe it down and refill.

Who It’s For

Owners of large or heavy cats, and anyone whose cat has outgrown a standard hooded box. It also suits two cats that share a pan. Skip it for kittens under about six months and for cats with stiff joints, because the climb in is real effort.

Length	20.75 inches
Width	16.12 inches
Height	14.62 inches
Origin	USA

What We Found

The Navy/White version shares the wide body of the Beige/White model: 20.75 by 16.12 by 14.62 inches with a 9 by 10.5 inch entry. IRIS labels its top entry boxes as made in the USA with globally sourced materials.

The grooved lid, the lift-off top, and the smooth interior match the beige box, so the choice mostly comes down to color. Dark plastic hides litter stains better than beige. It also shows dust and water spots faster, and you’ll see them if the box sits on a hard floor.

Color variants are priced separately on Amazon. If the two boxes cost the same on the day you shop, pick the color that fits your room.

Who It’s For

Buyers who want the wide footprint but not the beige, and anyone who wants a box made in the USA. It works for cats that need extra clearance going in and out.

Length	20.5 inches
Width	14.75 inches
Height	14.38 inches
Color	Black/Gray

What We Found

The standard-size Black/Gray box is 20.5 by 14.75 inches and about 14.4 inches tall, with a 9.25 inch round entry. The enclosed shape gives shy cats cover, and the top entry keeps dogs out. Owners in mixed households mention that more than any other benefit.

The dark plastic hides dust and dirt better than the light colors. Inside, the floor is 15 by 9.75 inches, which is fine for an average adult cat and snug for a big one.

Two owner notes are worth knowing. One buyer on IRIS’s own Black/Light Gray page liked the front lid latch but wished the back had a catch too. The included scoop also comes in for criticism on almost every IRIS listing, and this one is no exception.

Who It’s For

Households with one average-size cat and a dog that investigates the litter. It also suits anyone who wants a darker box that hides stains.

Length	20.5 inches
Width	14.75 inches
Height	14.38 inches
Color	Gray/White

What We Found

The Gray/White model has the same compact body as the Black/Gray box, in the most neutral color IRIS sells. The textured lid is the main scatter-fighter, and the enclosed shape gives nervous cats privacy while keeping dogs out. It fits in a small bathroom or a laundry room without taking over.

The plastic wipes down easily during a deep clean. Because the top entry forces cats to jump, granules tend to drop off their paws before they leave the box.

It won’t fix every cat. One Chewy reviewer says their cat launches litter and waste out through the hole after every visit, even with an extra-large mat around the box. No lid design beats a cat that sprints out of the box.

Who It’s For

Owners of small to medium cats in apartments or homes with limited space. It’s a good choice for multi-pet households where a dog raiding the box is a hygiene problem. Cats that want privacy tend to settle in.

Length	20.5 inches
Width	14.75 inches
Included	Scoop with hook
Entry	9.25 inch diameter

What We Found

The beige standard box ships with a scoop that hangs from a hook on the side of the pan. The tall walls keep spraying contained, and the top entry stops litter from flying out during a dig.

Inside, a cat has enough room to turn around, though the 9.75 inch floor width is the limit. IRIS builds the box in the USA with globally sourced materials, and the standard size sits at the low end of IRIS’s price range. The lid grooves catch fine particles, but clumping litter can stick in them.

The scoop is the weak spot. Several owners call it small or flimsy, and one Chewy buyer got a package with the hook missing. Plan on a sturdier scoop.

Who It’s For

Budget-conscious buyers who want a complete setup, including a hook for the scoop. It fits homes with neutral color palettes.

What Owners Say About IRIS Top Entry Litter Boxes

Ratings are high but not spotless. The White/Beige listing on Walmart shows 4.3 out of 5 across 233 ratings at the time of writing, and the loudest praise is about dogs and litter. Here’s what shows up again and again across Chewy, Walmart, IRIS’s own site, and one editor review.

Is an IRIS Top Entry Litter Box Right for Your Cat?

A top-entry box solves scatter and dog raids. It creates a new problem for any cat that can’t or won’t climb. Run through this before you order. If you’re still choosing between styles, our guide to a covered litter box with top entry and the top entry vs front entry litter box comparison lay out the differences.

For kittens and older cats, a low front entry works better. Arm & Hammer’s litter box guide explains why the height of the entry matters as cats age.

How to Get Your Cat to Use an IRIS Top Entry Litter Box

Most cats take a day or two. A stubborn one can take a couple of weeks. Rushing is how you end up with accidents behind the sofa, so go in this order.

1. Set the new box next to the old one. Leave the old box where it is for now.
2. Start with the lid off. Let your cat use the open pan first. Add the lid once they’re comfortable with the new spot and litter.
3. Fill it deep and mix in old litter. A shallow, light box can wobble when a cat lands on it, and one wobble can end the experiment. Add a scoop of used litter from the old box so it smells like a toilet.
4. Put the lid on and show the way in. Set your cat on the lid, or drop a treat near the opening so they get the idea.
5. Keep the new box spotless. Scoop the old box a little less often so the clean one wins.
6. Remove the old box after several days of steady use. If your cat backslides, take the lid off again for a week and repeat.

Cleaning and Setup Tips for Less Litter on the Floor

Daily scooping

Lift the lid, scoop, and tap the lid gently over the pan so the litter caught in the grooves falls back in. Use a small brush for any granules that stay on the top. The oval floor makes it harder to reach the corners, so angle the scoop instead of pushing it straight.

Deep cleaning every two to four weeks

1. Empty the pan into a bag.
2. Wash the base and lid with mild soap and warm water. Skip harsh cleaners that leave a smell your cat will avoid.
3. Dry everything fully before adding fresh litter.
4. Replace the box if the plastic is deeply scratched, because scratches hold bacteria and odor.

Cutting tracking even further

• Put a large litter mat at the side the cat exits.
• Try a low-track or larger-granule litter if fine granules keep escaping.
• Place the box on a hard, flat floor so the base can’t rock.
• Keep enough litter in the pan to weigh the box down.

IRIS vs Other Top Entry Litter Boxes

IRIS wins on price and simplicity. It loses on flexibility. Modkat, the best-known alternative, can be set up with a front entry, which helps kittens and older cats. Catster’s review of top-entry boxes also notes that the Modkat XL is light enough that some cats knock it over.

What to Look For Before Buying a Top Entry Litter Box

Balance your cat’s size against your floor space, then think about who else wanders by the box. A well-chosen box cuts daily chores. A poorly chosen one just moves the mess.

Dimensions and Clearance

Measure your space before you buy. Your cat needs room to turn around fully inside, and the lid adds height to the setup. Top-entry boxes also need vertical clearance for the jump, so avoid tucking one under a low shelf.

Material Quality

Look for thick, BPA-free plastic that resists scratching. Scratched plastic holds bacteria and makes odor control harder. Test the lid: it should sit firmly on the base at both ends, because a loose lid is the most common IRIS complaint after the scoop.

Ease of Cleaning

You want smooth interior walls that don’t trap waste, and a lid that lifts off in seconds. Check whether the design leaves room to reach corners with a scoop, since rounded boxes make that harder.

Tracking and Odor Control

Grooved or textured lids catch granules. Enclosed boxes hold odor better than open pans, but they need scooping every day to stay fresh. Check that the lid holes suit your litter, since clumping brands can stick in the grooves.

Quick pre-purchase checklist

• ☐ I measured the floor spot (at least 21 x 16 inches for the wide pan, 21 x 15 for the standard).
• ☐ My cat is a healthy adult that jumps without trouble.
• ☐ I checked whether the listing includes a scoop.
• ☐ I have a litter mat ready for the exit side.
• ☐ I’ll keep the old box out for a week or two.

IRIS Top Entry Litter Box FAQ

What size is the IRIS top entry litter box?

The standard box measures 20.5 by 14.75 by 14.5 inches, with a 9.25 inch round entry and a 15 by 9.75 inch floor. The wide pan runs about 20.5 by 16.1 by 14.6 inches, with a 17.5 by 13.5 inch floor. IRIS uses the word Large on both, so check the width.

Will my cat use a top-entry box?

Most cats adapt quickly, and plenty use one on day one. Owners report success even with a formerly feral cat and a cat that had refused other enclosed boxes. It isn’t universal. Kittens and older cats with mobility issues should get a different style, and the training steps above explain how to introduce the lid.

Is the IRIS top entry litter box good for large cats?

The wide version is the one to buy. Its 9 by 10.5 inch entry and 17.5 by 13.5 inch floor suit most big cats. Very large breeds may still feel cramped, and one buyer of IRIS’s largest box says even a small adult cat can bump the lid. Measure your cat’s standing height as well as its length.

Is it good for kittens or senior cats?

Usually not. Kittens generally do better with an open or low-entry box until they’re around four to six months old, and cats with arthritis do better with a low front entry. The IRIS entry sits at the top of a 14.5 inch body, so a cat has to climb up and drop in.

Are these boxes really dog-proof?

They deter most dogs, and owners with visiting or resident dogs say the top entry works. It’s a deterrent, not a vault. A small, determined dog can still get onto the lid. The box does keep the pan out of reach for most, and it’s a good fit for multi-pet homes.

Does the lid design actually reduce tracking?

Yes. The grooved lid acts as a filter for your cat’s paws. As the cat steps out, the grooves catch loose granules and drop them back into the box. A cat that bolts out after using the box can still fling litter, so a large mat helps.

Does the IRIS top entry litter box control odor?

The enclosure helps, but owner opinions on smell are mixed. The listings I checked mention no vents or carbon filter, so daily scooping does the real work. Wash the box every two to four weeks.

How do I clean a top-entry litter box?

Remove the lid to scoop daily. For a deep clean, wash the base and lid with mild soap and warm water. Make sure the box is completely dry before you add fresh litter.

How often should I change the litter?

Change it as often as your cat’s use dictates. A top-entry box often allows a deeper litter bed, which can stretch the time between full changes. Scoop every day either way to keep the box fresh.

Does it come with a scoop?

It depends on the listing. IRIS’s store sells the standard White/Gray box at $25.99 without a scoop and $27.99 with one. The included scoop has a hook that hangs on the pan, and owners call it small and flimsy. Expect to upgrade.

Is the IRIS top entry litter box made in the USA?

IRIS labels these boxes as “Made in USA with global materials.” That means assembly is domestic while some materials come from abroad.

What is the weight limit?

The listings I checked don’t publish a weight rating. Stability depends on how much litter is in the pan. One pet-site editor found a lightly filled box wobbled and spooked their cat, so fill it deep and set it on a flat floor.

What if my cat stops using the litter box?

Call your vet first. Sudden litter box avoidance can point to a urinary problem or pain, and a new box shouldn’t be the first suspect. If the vet clears your cat, take the lid off and return to the open pan for a week.

🎯 Final Verdict: Our IRIS Top Entry Litter Box Review

Buy the Large Beige/White wide box if your cat is medium to large or two cats share the pan. It has the most floor space of any IRIS model and the same track-catching lid as the rest. Prefer navy? The Navy/White box is the same body, so buy whichever costs less on the day.

If your cat is average size and the floor space is tight, the Gray/White standard box saves about 1.4 inches of width and costs less. Skip the whole category for kittens, seniors, and cats with stiff joints. One warning applies to every model: the scoop is weak. Budget for a better one, and for a litter mat.

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