New Design! Owner and her Sassy Cat use it daily. One set actually lasted 8 months as a test. No leak corners! Use this design to teach your kitties to use a covered litter box and reduce litter scatter. Very large size 17 long x 17.5 wide x 15(inches) TALL includes 3 sets makes 3 long lasting biodegradable and disposable litter boxes. Large 9 inch diameter perforated hole for top lid use or optional front entry biodegradable litter box. Each complete litter box set contains 3 pieces; a bottom, a lid and a multi-purpose pad. The multi-purpose pad can be used to add an extra layer to the bottom of the litter box, or to be used to cover the waste for disposal. The lid can be used to reinforce the bottom, or to create a covered litter box. The lid also can be used as the bottom for a low entry for kittens and senior cats.All pieces are lined with a moisture-barrier coating to extend the life of the box, but not waxed to retain biodegradability. The unique corner design do not allow leakage, making this box last.andPatent pending extra large design. 17"long x 17" wide 15.25" tall with a 9" diameter top opening, when using the lid option. Designed and used by the owner and her Sassy Cat(pictured) daily. U.S. sourced, made and woman owned. Please see folding video.