Berrysun Large Cat Door for Pets (Outer Size 9.9 x 9.2 inch) 4 Way Locking Cat Flap for Interior Exterior pet Door, Easy & Quick Installation Ideal for Adult Cats and Small DogSIZE: Its a large cat door, outer size: 9. 25"(w) x 9. 92"(H) x 2. 16"(D), Inner size: 7. 08"(W) x 7. 48"(H), Cut Out Size: 7. 7"(W) x 8. 3"(H), suitable for installation on doors, thin metal doors and walls, The cat door is suitable for walls with a thickness of 2. 36 inches. If the wall exceeds this thickness, there will be gaps in the cat door. suitable for cats lighter than 17 Lb and waist circumference less than 23" 4 WAY LOCKING: The cat flap