Horses are divided into three principal classifications, with about 100 breeds. A pony stands between 10 and 14-2 hands (a hand is four inches). A light horse stands between 14-2 and 17 hands. And, a draft horse stands between 15-2 and 19 hands. The four stamp designs shown here represent the many breeds of horses, mules, and donkeys resident in North America. Light horses are used for pulling light vehicles, racing, ranch work, riding, and warfare. Draft horses continue to be used for pulling heavy loads and for farm labor.