Which is bigger, an Irish wolfhound or a Scottish Deerhound?

The Irish Wolfhound is bigger than the Scottish Deerhound. Irish Wolfhounds are among the tallest dog breeds, with males often standing about 32 to 34 inches at the shoulder and weighing between 140 to 180 pounds. Scottish Deerhounds are smaller by comparison. Males usually stand about 30 to 32 inches at the shoulder and weigh between 85 to 110 pounds.