Kitty Cot Original (Large) measures 25-1/2″ wide x 14″ deep (width measured from outside edges of suction cups on Kitty Cot). Actual frame dimension is 14" x 23-1/2". Minimum window glass for use is 25" wide x 21" high. Kitty Cots attach to glass windows, mirrors and smooth non-porous surfaces using four PATENTED Giant Suction Cups made in the USA. Each cup is rated for 12 pounds so the Kitty Cot will hold about 25 pounds of cat(s). Kitty Cots work indoors and outdoors. The frame is made of PVC plastic pipe and fittings. It’s not glued together so it can be taken apart. The Kitty Cot hammock is a super-tough black nylon fabric called “Tiger-Mesh”. It’s so strong that it’s virtually impossible to rip or tear, and cleans easily with soap and water. Our design is so simple that anyone can put it up, and best of all you need no tools to install it. Lay your cat's favorite blanket or pad down to make it even more bed-like and comfortable. Install it next to an outside bird feeder or another action location and your cat will be entertained for hours.