This is a list of the weight classes in
Professional Boxing. Heavyweight Boxing and Flyweight Boxing are nearly different sports. The number listed is the max weight for that class.
Heavyweight: unlimited
Cruiserweight: 190 lbs
Light Heavyweight: 175 lbs
Super Middleweight: 168 lbs
Middleweight: 160 lbs
Junior Middleweight: 154 lbs
Welterweight: 147 lbs
Junior Welterweight: 140 lbs
Lightweight: 135 lbs
Junior Lightweight: 130 lbs
Featherweight: 126 lbs
Junior Featherweight: 122 lbs
Bantamweight: 118 lbs
Junior Bantamweight: 115 lbs
Flyweight: 112 lbs
Junior Flyweight: 108 lbs
Strawweight: 105 lbs