Big? That’s putting it mildly. The Irish Wolfhound is an immense, muscular hound. A fully mature male might stand 32 to 34 inches at the shoulder and weigh 120 pounds. This tallest of all AKC breeds is nonetheless gracefully built along classic Greyhound lines and can cover lots of ground quickly when at full gallop. The hard, medium-length coat comes in many colors, including white, gray, brindle, red, black, and fawn.