Amazon Link: https://amzn.to/3zUMfeu

Size: 30.1 x 0.39 x 24 inches

Personal Experience: 
We have used this product for about a year now, and the product works well in trapping the litter, but I would recommend the largest size as my cats still manages to get their litter out of the matt. What litter does get on the matt makes it very easy to dump right back into the litter box for an easy clean.

About Product:

The double-layer honeycomb shape of the anti-tracking litter mat makes it easier to collect the litter. When you pick up the mat, all the litter falls through, and you may recycle it by dumping it back into the litter box. My feet are no longer always covered with trash! Large holes can easily collect and trap trash. suitable for many different types of litter, as well as hooded, self-cleaning litter boxes for cats.

Waterproof/Urine Proof Mat: The bottom layer is waterproof and slip-resistant, preventing any liquid from passing through yet allowing for simple movement. You may hose off the mat if it has cat vomit on it, making it simple to clean and dry. Prevent unpleasant pee stains on your carpets and wooden surfaces. Stop the cat's urine from spreading all over the place.

Simple to Maintain Washable Litter Mat: The litter box mat is constructed in a way that makes it washable. Dirt is simple to get rid of. You don't need to vacuum or sweep up the trash every day which will save energy and time! Plastic cat mats must be vacuumed to remove cat litter, but they still can't be completely cleaned.