There are 17 weight classes or weight divisions for professional male boxers (*) recognized by the Association Boxing Commissions (ABC) and the following sanctioning bodies; International Boxing Federation (IBF), International Boxing Organization (IBO), World Boxing Association (WBA), World Boxing Council (WBC) and World Boxing Organization (WBO). Below are the weight limits for each weight class and weight class names used by each of the boxing organizations.
Note: 1 kg equals 2.20462262185 lbs
Note: Theoretically only the maximum weight for each weight class or division is the limit. For example a boxer who only weighted 115 lbs could fight in a welterweight bout against a true welterweight weighting 147 lbs but it just wouldn’t happen now days because the commissions would not allow it due to the potential liability of the lighter fighter getting seriously injuried by the over powered heavier fighter.
(*) Weight classes for female boxers in the ABC are the same used by men. In other sanctioning bodies such as the IFBA, WBA, WBC and WIBF weight classes for women differ