Weight Divisions

Heavyweight: Unlimited
Cruiserweight: Limit - 190 pounds
Light Heavyweight: Limit - 175 pounds
Super Middleweight: Limit - 168 pounds
Middleweight: Limit - 160 pounds
Super Welterweight: Limit - 154 pounds
Welterweight: Limit - 147 pounds
Super Lightweight: Limit - 140 pounds
Lightweight: Limit - 135 pounds
Super Featherweight: Limit - 130 pounds
Featherweight: Limit - 126 pounds
Super Bantamweight: Limit - 122 pounds
Bantamweight: Limit - 118 pounds
Super Flyweight: Limit - 115 pounds
Flyweight: Limit - 112 pounds
Junior Flyweight: Limit - 108 pounds
Strawweight: Limit - 105 pounds

In no instance can a fighter officially compete for a championship in a division lower than his/her weight class.

Junior/Light Middleweight = Super Welterweight
Junior/Light Welterweight = Super Lightweight
Junior Lightweight = Super Featherweight
Junior Featherweight = Super Bantamweight
Junior Bantamweight = Super Flyweight
Junior Flyweight = Light Flyweight
Strawweight = Minimum Weight = Mini Flyweight = Paperweight

These designations are used interchangeably but, in general:

WBC, WBA and IBO use the "Super" designation IBF and WBO favour the "Junior" designation
Note: A 'Catchweight' bout is intermediate between two weight classes