Petsfit Wooden Cat House Gary Scratching pad design prevents your cats breaking the furniture Easy to assemble with pre-drilled hole Asphalt roof prevents your cats from raining day Inner dimension:19"Lx19"Wx11"H,more details please refer to the PICTURE Ideal shelter for outdoor cats with escape door Panel walls are 12mm thick. Petsfit pet house is made of cedar,this kind of wood isanti-rot material,but it will split under impropertransportation. Houses are stury once set up.(HOWEVER, if you have a pet that chews and is destructive, thisis not the house for you.) The wood would last at least 3 years outdoor(tested). Dimensions will be marked as specific as possible on all our products,error may occurred,measuring error within 1 inch. We test the pet products with our own pet,normal size cat 12LBS.Estimation might be inaccurate. Please compare it&#039;s size with the kennel,carrier or house you have and choose the right size.