The Cob is not a breed but a type of horse which is characterized by short legs, substantial muscling, strong and thick bones, deep girth, a short back, an arched and powerful neck, and the ability to carry and pull heavy weight at a reasonable speed. Cob horses also have a straight or Roman profile, and often have thick manes and tails. Some, but not all cobs, sport feathering as well.

Horses of the cob type were popular through history, but the term "cob" was coined only in the 18th century. They were usually created by crossing a large horse, such as a draft horse, with a smaller horse or a pony. This resulted in horses which had the kind and gentle temperament of their draft ancestors, and, because of their relatively small size, were popular mounts among old or inexperienced riders.

Cob horses were also popular among Gypsies, who bred cobs by crossing British draft horses, mostly of the Shire and Clydesdale breeds, with British and Irish pony breeds. The result of these crossings was the Irish Cob, from which the popular Gypsy Vanner breed was developed (see the 'Gypsy Vanner' breed for more info). Other cob breeds include the Welsh Cob and the French Cob (also called Norman Cob). All of these breeds can be found in Horse Isle.

Today, cobs are popular mounts and are used in various disciplines, from professional cob shows to recreational riding. They come in a large variety of colors and patterns, and can stand between 14.2hh and 16.3hh, though most of them stand between 14.2hh and 15.3hh.