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In professional boxing, boxing matches are classified into several classes which is based on body weight of boxers. WBA, WBC, IBF and WBO, which is the fourth world of professional boxing organization, generally have a classification similar grade levels. It’s just that there are several different naming at a little classes among the four world boxing organization. Classes based on body weight is the upper limit of weight boxer who fought in that class. So, that is the minimum limit for the class which is above it. These kinds of classifications classes in professional boxing world ranging from the heaviest to the lightest.

Unlimited

WBA    : Heavyweight
WBC    : Heavyweight
IBF       : Heavyweight
WBO    : Heavyweight

200 Lb (90.7 Kg)
WBA    : Cruiserweight
WBC    : Cruiserweight
IBF      : Cruiserweight
WBO    : Junior heavyweight

175 Lb (79.4 Kg)

WBA    : Light heavyweight
WBC    : Light heavyweight
IBF      : Light heavyweight
WBO    : Light heavyweight

168 Lb (76.2 Kg)
WBA    : Super middleweight
WBC    : Super middleweight
IBF      : Super middleweight
WBO    : Super middleweight

160 Lb (72.6 Kg)
WBA    : Middleweight
WBC    : Middleweight
IBF      : Middleweight
WBO    : Middleweight

154 Lb (69.9 Kg)

WBA    : Super welterweight
WBC    : Super welterweight
IBF      : Junior middleweight
WBO    : Junior middleweight

147 Lb (66.7 Kg)

WBA    : Welterweight
WBC    : Welterweight
IBF      : Welterweight
WBO    : Welterweight

140 Lb (63.5 Kg)
WBA    : Super lightweight
WBC    : Super lightweight
IBF      : Junior welterweight
WBO    : Junior welterweight

135 Lb (61.2 Kg)
WBA    : Lightweight
WBC    : Lightweight
IBF      : Lightweight
WBO    : Lightweight

130 Lb (59.0 Kg)
WBA    : Super featherweight
WBC    : Super featherweight
IBF      : Junior lightweight
WBO    : Junior lightweight

126 Lb (57.2 Kg)
WBA    : Featherweight
WBC    : Featherweight
IBF      : Featherweight
WBO    : Featherweight

122 Lb (55.3 Kg)
WBA    : Super bantamweight
WBC    : Super bantamweight
IBF      : Junior featherweight
WBO    : Junior featherweight

118 Lb (53.5 Kg)
WBA    : Bantamweight
WBC    : Bantamweight
IBF      : Bantamweight
WBO    : Bantamweight

115 Lb (52.2 Kg)
WBA    : Super flyweight
WBC    : Super flyweight
IBF      : Junior bantamweight
WBO    : Junior bantamweight

112 Lb (50.8 Kg)
WBA    : Flyweight
WBC    : Flyweight
IBF      : Flyweight
WBO    : Flyweight

108 Lb (49.0 Kg)
WBA    : Light flyweight
WBC    : Light flyweight
IBF      : Junior flyweight
WBO    : Junior flyweight

105 Lb (47.6 Kg)
WBA    : Minimumweight
WBC    : Strawweight
IBF      : Mini flyweight
WBO    : Mini flyweight

80 Lb (40.6 Kg)
WBA    : Paperweight
WBC    : Paperweight
IBF      : Mini Paperweight
WBO    : Mini Paperweight