These stairs are misrepresented in the measurements. The product description says the stair treads are 9" deep, but because of the way they're constructed, with the bottom step tucked under the top step by at least 2 inches, the usable depth is only about 6 or 7 inches, making the stairs far too steep for my 15 year old corgi to manage. I think they would work only for cats, or very small dogs.