Dog Mate Dog Door is a neatly designed door suitable for small dogs up to 14" shoulder height, as well as for the largest cats. The transparent, silent action flap is preferred by most pets and magnetic closure keeps flap shut in strong winds. Secure 4-way locking system gives you complete control over your pet's access. The adjustable, 0-2", door liner gives neat, easy installation in all doors, walls and screens. Overall size: 9 1/4" x 10". Cut out size: 8 1/4" x 9". Opening size: 7 1/8" x 7 1/2".