It is no wonder why cats like to perch. They like to being high.Give your feline friend a fun entertaining view of window penthouse cause they deserve better treat ！ Contents & Materials: Cat Bed *1 in Soft Plush Metal frame : 2 Suction Cups : 4 in PVC Dimension : Weight: 2.4 Pound Measurement of the item :14.5" x14.3 " x 1.6" ( L x W x H ); Cat tray: External diameter:14.5" Internal diameter: 11.5" Depth : 1.6" Metal frame : Diameter for circular support : 13.4" Length for metal support: 7.8"&14.9" Suction cup diameter:3.2 " Q&A: Q:What size of window or glass does this cat perch will fit ? A: The smallest HORIZONTAL size of the glass is 10.6”/ 27CM, and the smallest VERTICAL size is 13”/33CM. Q:Does this require a window sill or tool to set up ? A:It's free hanging, metal supported with four suction cups to attach the points directly to the window glass . No tools required. Q:How to get best grip for suction cup A: Step 1 Please clean the surface of glass thoroughly before attaching the cups Step 2 Soak the cups a few minutes in warm water . Step 3 Make glass surface and cups dry. Step 4 Make sure the suction cups are well-pressed against the glass to create sufficient air pressure control