Cats Rule Max's Box - Heart Closed Box Ice Wide heart shaped opening,positioned at the perfect height, makes it easy for entry Height and turning space allow enough room for your cat to move around comfortably inside the box High sides and back are great for controlling spraying and litter scratching inside the box Double vented top & back to help encourage air circulaton Easy to clean - Measures 15" wide x 19" high x 20" deep. Opening measures 9" x 9" Height of Opening is 5 1/2"