Coliseum with Shelf Cat Tree with (2) Sisal Legs Four solid wood posts are securely fastened to our wide wobble-free 24"x24" base. For a design that will hold up to the largest and most active cat you know. With its large 24" x 15" shelf and sleep-tray 20"x20"x3" this is a purr-fect choice for the multiple cat household. Perfect for watching nature from their favorite window! Large Top Tray 20"x20"x3", Room for 3, Large Middle Shelf 24"x15", Perfect Window Height 30" Tall Simple Assembly Required Plush carpeting in your choice of 4 different colors