The Small tree house is a simple piece of cat furniture for your cat. It has a 16 x 19" base, a 18" high front leg, a 30" back leg. A flat shelf rests on top of the lower leg for easy access into the house. The house on top of the back leg is 12" high with an 8 x 8" opening. 42 inches high to the top of the house on the outside. Comes in neutral color unless specified. ASSEMBLY IS REQUIRED. Instructions and hardware included.