The conformation of the Clydesdale has changed greatly throughout its history. In the 1920s and 1930s, it was a compact horse smaller than the Shire, Percheron, and Belgian. Beginning in the 1940s, breeding animals were selected to produce taller horses that looked more impressive in parades and shows. Today, the Clydesdale stands high and weighs . Some mature males are larger, standing taller than 183 cm and weighing up to . The breed has a straight or slightly facial profile, broad forehead, and wide muzzle.