Junior Flyweight (also widely known as Light Flyweight or Super Strawweight) is a professional boxing weight class with a strict upper limit of 108 pounds (49.0 kg). [1, 2]
Fighters in this division typically weigh between 105 and 108 pounds. Anyone weighing under 105 pounds falls into the Strawweight/Minimumweight category, while anyone over 108 pounds moves into the traditional Flyweight division. [1, 2]
Naming Conventions
Depending on the sanctioning body or publication, you will see different names used for this exact same 108-pound limit: [1]
Junior Flyweight: Frequently used by the WBO and IBF.
Light Flyweight: The preferred term for the WBC, WBA, and The Ring magazine.
Super Strawweight: A less common developmental term. [1, 2, 3, 4, 5]
Style and Characteristics
Because these athletes are among the lightest in the entire sport, junior flyweight fights are famous for their blinding speed, relentless endurance, and high volume of punches. [1]
While traditional "one-punch knockouts" are rarer here than in the heavyweight division, the sheer velocity and relentless pacing lead to highly technical, action-packed fights. The division enjoys massive popularity and deep talent pools across Asia (especially Japan and Thailand) and Latin America. [1]
Brief History
The division was initially written into New York law in 1920 but was quickly abolished by the end of the decade due to a lack of active competitors. It was officially resurrected in 1975 by the WBC and WBA to create a stepping stone between the smallest fighters and the 112-pound flyweights. The division achieved historic mainstream status in March 1993, when Michael Carbajal and Humberto González fought in a massive unification "superfight," leading to the division's first million-dollar purse. [1, 2]