Ancol Sleepy Paws Self Heated Pet Pads are a fantastic innovation that your dog or cat is going to love. Designed with a clever thermal structure that reflects your pets" heat back towards them, the Self Heated Pads are covered with a luxuriously soft, sheepskin style cover. The pad can fit into the majority of beds, dog crates, cages or can simply be placed onto the floor to create a cozy spot for your little friend to curl up. The cover can easily be removed to wash separately for easy maintenance. Small - 19" x 15" (48 x 38cm), Medium - 25" x 19" (64 x 48cm), Large - 35.5" x 25" (90 x 64cm).