The Dog Mate Medium Dog Door is suitable for medium dogs such as spaniels, terriers and poodles, up to 460mm shoulder height. Flap size: 220mm W x 280mm H Overall size: 290mm W x 350mm H Cut-out size: 242mm W x 300mm H Self-lining to 50mm thick – ideal for doors, walls and specially made toughened glass (contact us for further information) Material: Plastic