K&h Pet Products Kh Pet Bed Warmer : Pet Bed Warmer turns any pet bed into a cozier place to be! Available in 3 sizes, each utilizing dual thermostats for added comfort. It can be placed inside virtually any pet bed and is easy to use: Just plug it in! Designed to warm only when inside your pet's bed. Intended for indoor use only. Small: 9 1/2 x 9 ..