For color choices, see Alternate Images Your kitties will have lots of fun playing in and out of the many openings on this cube before taking a catnap on the sleeper tray on top. The sturdy design features a low center of gravity to prevent tipping.  The sleep tray is 13 1/2 inside x 15 1/2 outside and is 29 tall.  Contains 2 partial' shelves inside, (allowing your cats to come in one opening and go out another).  Shelves, bottom and most of the walls inside are carpeted with inside dimensions of 13 1/2 square. All our products are made of solid wood and plywood - no particle board or cardboard is ever used. Approx Size 16x16x29 Read less