I think it would be a good idea to place something of reference next to this Grommit 5-step pet stair because the steps are VERY narrow & steep. The LxWxH dimensions were provided, but NOT the stair depth, which is 5 inches. Fortunately, I ordered a different one and its stair depth is 7-3/4 inches. This item is well made and washable, but it will be saved for the kitties for when they get too old to jump from the floor to the bed!