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Extra Large Open Top Litter Box Made For Big Cats

An extra large open top litter box will ensure that your large cat is comfortable when using the litter box. An extra large litter box will also help contain the litter to the box.

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Reviews – Extra Large Open Top Litter Box

1. Petmate Giant

Petmate Giant Litter Pan High-Capacity Cat Litter Box Blue Mesa Color

This is called Giant because of its size. The measurements are 25.56 x 18.3 x 10.02 inches.

Some of you may remember another Petmate litter box called Giant also. It had two pockets at the front for storing accessories such as a litter scoop, small hand brush, rake or wipes. That particular box has not been available, but is now back in stock – The Petmate Giant Litter Pan for Cats. A little confusing as two of Petmate’s litter boxes are called Giant.
Interestingly, once the two pockets at the front are discounted in the litter box size, that box measured 27 x 17 x 10 inches. Very little difference with the box being reviewed here. Do you really need the pockets at the front? That is a personal choice.

It holds up to 30lbs of litter if necessary.

There is a non stick coating on this box. If it eventually wears off, try DIY non-stick coating on any litter box.

This box is blue or blue!


It has sloped sides so that the front edge is lower (6 1/2 inches approx) which is good for older cats.

The edges are rimmed which helps when lifting the box.


The front edge may be too high for kittens. In this case a booster step would work until the kitten grew.

Some cats pee over the lower front edge.


The size is 25.56 x 18.3 x x10.2 (LXWXH)

The box weighs 1 kilogram it is made from BPA free plastic.

2. Frisco High Sided Cat Litter Box – Extra Large 24-In

The measurements for the box are 24 X 18 X 10 inches. The height for the cat to step into the box is 6 inches.

At 24 inches long it has the tick of approval from a Maine Coon owner whose cat also happens to be a high peer.

The surface is polished making it easy to clean. The open top and lower font make it also easy to scoop and keep clean.

With a 10 inch rear wall this box has had a good reaction from owners with high peeing cats unless they turn around and pee through the entrance. In that case place the entrance facing a wall.

The plastic is BPA free and the box can be recycled.

There is no lid for this box. The box is sturdy and thick plastic,

It comes in two colors gray and navy. One helpful review commented that the navy shows the dust from the litter so if that is going to annoy you, gray is a better color choice.

Another excellent suggestion is to use a marker to draw a line on the box at the three inches mark so that you can see at a glance how much litter needs to go into the box. With very large boxes, the size can cause us to overfill the box when it is absolutely not necessary.

This box has positive reviews regarding litter actually staying in the box and is recommended even if you do not have a super large cat.

extra large open top litter box

3. iPrimio Ultimate Stainless Steel Litter Box  

This extra large open top litter box is also large. The measurements are 23.5 x 15.5 x 6 inches.
This may be the first time you have considered a stainless steel litter box.

We are so used to plastic of one type or another. However stainless steel makes perfect sense. Our cats food bowls and water bowls are mainly stainless steel.

What I really like about stainless steel is the ability to get it really clean. Plastic can absorb odors over time. Stainless steel will outlive plastic many times over.

Not contributing to landfill is a win win for me.

Size wise, It is not quite as large as the Petmate Giant and we do have to consider kitty size here as well as the attributes of the litter box.

iPrimio Ultimate Stainless Steel Cat XL Litter Box - Never Absorbs Odor, Stains, or Rusts - No Residue Build Up - Easy Cleaning Litterbox Designed by Cat Owners (1 Pan)

There is also a stainless steel surround that can be purchased separately. It fits onto the top of the box to make the box higher. This is good news for litter control.

iPrimio Cat Litter Box Enclosure Stainless Steel Litter Box - Litter PAN is NOT Included. Patent Pending iPrimio Enclosed Sides Stainless Steel Cat XL Litter Box Keep Litter In the Pan - Never Absorbs Odor, Stains, or Rusts - No Residue Build Up - Easy Cleaning Litterbox Designed by Cat Owners - Patented

Measure the cat from his cute little nose to the base of his tail (not the end of his tail)
Have the measurements at hand of all the boxes you think may be suitable
Measure the location where the box will be placed. If space is tight make a paper pattern of the dimensions and fit into the allocated space. Does it fit?

4. Nature’s Miracle Just For Cats Advanced High Sided Cat Litter Box

This litter box measures 23.4 x 18.25x 11 inches making it slightly smaller than the Frisco box but is 11 inches high rather than 10 inches high so has the slight edge height wise.

The entrance is approximately 5 inches high so easy for the cat to exit and enter. The 5 inch entrance would possibly work for a large senior kitty depending on the mobility of the cat. Older cats can also have trouble squatting so higher sides once again are a plus.

This box is black, large and has high sides.
Higher sides do also suit the needs of a large cat who may have problems with their rear end hanging over the sides of a box with lower sides. Using a box with higher sides solves this problem.

Low opening approx. 5 inches. Good for large cats with mobility issues

5. Van Ness High Sides Cat Litter Pan – Giant

There are two different size Van Ness litter pans. The size being reviewed is the Giant size, measuring 21.25 x 17.75 x 9 inches.

There is also a Large pan however it has smaller dimensions.

If you click through to see more information about this litter box please make sure that you choose either the Large or the Giant to see the product you are interested in.

This box has very positive reviews with a staggering 96% of people who reviewed the product also recommending the product. At 9 inches height apart from the opening which is 6 inches high, it gets good reviews for the size being suitable for large cats and the litter staying mostly in the box.

Even if your cat is not overly large it makes sense to get the giant box to keep litter confined and to allow the cat plenty of pace to move around.

The corners of the box are rounded making it easy to scoop.

The finish is polished to once again help with scooping and emptying the litter There is 20% recycled content in this product. It is made in the USA.

An all round good buy!

6. Nature’s Miracle Disposable Cat Litter Box

Yes, this is a disposable litter box but it is very large hence its inclsuion in the list.

It makes a great temporary box if you are not yet sure what to get. It’s also a good way to test the size dimensions to see how well they work for your cat. You will then know if the size is okay or if you do need a larger litter box.

The measurements of this box are 21 x 14.5 x 8.375 inches. There are two in the Jumbo size pack. Having two boxes gives you enough time to test the dimensions.

Some people do choose to use an extra large open top litter box that is disposable, on a permanent basis. They are also excellent if you are unable to cope with a normal litter box for what ever reasons perhaps relating to health or mobility. The box can just be replaced rather than having to dispose of the litter plus wash the box.

Our Top Pick

We choose the Petmate Giant because of its size. As size and open top are the main criteria for this litter box, this box is the winner.

All of the boxes on this page are quality boxes and all were chosen with many positive features. It may be that you are willing to compromise slightly on size if there is another feature you like. For example, Nature’s Miracle box is large but has a low opening at the front which would suit a cat with mobility issues.

We hope that we have been able to provide you with enough information to make the best choice for your large cat.

More Extra large Open Top Litter Boxes

large litter boxes
Such good news dear! Larger litter boxes are better! Are you awake dear?

Large Litter Boxes – Further Reading

What if you would prefer a covered box for your large cat? No problems! There is further reading here.

How do you go about choosing a litter box for a large cat? Read the basic requirements of litter boxes for large cats set out in this article, so you have a clear idea of what you are looking for.

If you are undecided about a covered or an uncovered box, this is a good place to start reading.

If your cat is elderly cat, litter box requirements do change over time.

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