Flyweight is a class in boxing which includes fighters weighing up to and including 51 kg (112 lb) for a title fight.[1]
Professional boxing
The flyweight division was the last of boxing's eight traditional weight classes to be established. Before 1909, anyone below featherweight was considered a bantamweight, regardless of how small the boxer. In 1911, the organization that eventually became the British Boxing Board of Control held a match that crowned Sid Smith as the first flyweight champion of the world. Jimmy Wilde, who reigned from 1916 to 1923, was the first fighter recognized both in Britain and the United States as a flyweight champion.[2]
Below is a list of longest reigning flyweight champions in boxing measured by the individual's longest reign. Career total time as champion (for multiple time champions) does not apply.
In kickboxing, a flyweight fighter generally weighs 53 kg (116 lb) or under. The International Kickboxing Federation (IKF) Flyweight division (professional and amateur) is 112.1 lb. – 117 lb. or 50.95 kg – 53.18 kg.
In ONE Championship, the flyweight division is up to 61.2 kg (135 lb).
Bare-knuckle boxing
The limit for flyweight generally differs among promotions in bare knuckle boxing: