Missoulian: World's tallest horse visits Missoula today: "Goliath is a 14-year-old Percheron draft horse who stands 19.1 hands tall. That's three to five hands taller than your typical horse and a hand or two higher than the average Percheron.
In all, Goliath stands 6-foot-5 from hoof to withers. He weighs 2,500 pounds, or 1 1/4 tons.
That's about double the average horse, and 500 pounds more than most Percherons."
There's a photo and more details on the link.