Percherons are similar in size to Clydesdales. While the average weight of a Percheron is more, Clydesdales are typically taller. Both breeds are among the largest horse breeds in the world. The ideal size of a Percheron varies by country, with heights ranging from 15.1 to 18.1 hands in France and 16.2 to 17.3 hands in the United States.