Petmate Mattress Kennel Mats are specifically designed for use in the car, at home, or inside crates. Comes in a variety of sizes and is designed to fit standard wire dog kennels from sizes 19 inches to 48 inches. Petmate Mattress Kennel Mats bring comfort to your pet while being in their kennel when you re away. Designed to offer your pet support and comfort, the sleep surface is made up of a soft and cozy terry plush fabric, while the mattress is filled with densified polyester batting. A non-skid bottom helps keep the mat in place. For easy cleaning, they are Machine Washable. Compatible kennel sizes and mats: XS = 19 inch kennels, S = 24 inch kennels, M = 30 inch kennels, L = 36 inch kennels, XL = 40 inch kennels, Giant = 48 inch kennels. Dimensions: 17.5 X 11.5.