Amateurs are given a 1.9 LB/0.86kg weight allowance
Pros are given a 1.0 LB/0.45kg weight allowance
Fighters must be within 5-7 LB/2.3-3.2kg within their opponent.

MINI FLYWEIGHT: Up to and including 105 pounds - 47.6kg

LIGHT FLYWEIGHT: 108 pounds - 49kg

FLYWEIGHT: 112 pounds - 50.8kg

SUPER FLYWEIGHT: 115 pounds - 51.1kg

BANTAMWEIGHT: 118 pounds - 53.5kg

SUPER BANTAMWEIGHT: 122 pounds - 55.3kg

FEATHERWEIGHT: 126 pounds - 57.1kg

SUPER FEATHERWEIGHT: 130 pounds - 58.9kg

LIGHTWEIGHT: 135 pounds - 61.2kg

SUPER LIGHTWEIGHT: 140 pounds - 63.5kg

WELTERWEIGHT: 147 pounds - 66.6kg

SUPER WELTERWEIGHT: 154 pounds - 69.8kg

MIDDLEWEIGHT: 160 pounds - 72.5kg

SUPER MIDDLEWEIGHT: 168 pounds - 76.2kg

LIGHT HEAVYWEIGHT: 175 pounds - 79.3kg

CRUISERWEIGHT: 200 pounds - 90.7kg

HEAVYWEIGHT: Over 200 pounds - 90.8kg+