Its breeding began in 1990 in America, and today more and more beautiful large and small bullies are being produced by some renowned breeding circles. The breed is also becoming more and more well-known in Hungary.

It can be categorized in 6 sizes, each of which is characterized by a dazzling muscular structure. In the beginning, there were the standard, classic and extreme, as well as the XL breed, and later it was thought that it would give the breed a pleasant stocky appearance if they were lowered and shortened, so the pocket and micro exotic American bullies were bred.

However, Kennel Clubs that also issue pedigrees currently only recognize 4 types: