Magnetically Operated Cat Flap - WHITE - with see through flap Helps keep out strays Magnet collar key Gives your cat the key to your home Universal fitting for windows, walls and doors For cats up to 7kg (15lbs) Overall size: 241mm x 252mm (9 1/4" x 9 3/4") Cut out size: 168mm x 175mm (6 1/2" x 6 3/4") Glass cut out: 212mm (8 3/8") diameter circle Maximum Pet Shoulder Width: 150mm (5 7/8")