職業拳擊比賽分為8個體重級別，具體可以分為17個級別：

1、Heavyweight (over 190 lbs.)重量級(86公斤級以上)

2、Cruiserweight (190 lbs.)次重量級(86公斤級)

3、Light Heavyweight (175 lbs.)輕重量級(79公斤級)

4、Super Middleweight (168 lbs.)超中量級(76公斤級)

5、Middleweight (160 lbs.)中量級(73公斤級)

6、Junior Middleweight/Super Welterweight (154 lbs.)初中量級/超次中量級 (70公斤級)

7、Welterweight (147 lbs.)次中量級 (67公斤級)

8、Junior Welterweight/Super Lightweight (140 lbs.)初次中量級/超輕量級 (64公斤級)

9、Lightweight (135 lbs.)輕量級(61公斤級)

10、Junior Lightweight/Super Featherweight (130 lbs.)初輕量級/超次輕量級 (59公斤級)

11、Featherweight (126 lbs.)次輕量級 (57公斤級)

12、Junior Featherweight/Super Bantamweight (122 lbs.)超最輕量級(55公斤級)

13、Bantamweight (118 lbs.)最輕量級(53公斤級)

14、Junior Bantamweight/Super Flyweight (115 lbs.)超次最輕量級(52公斤級)

15、Flyweight (112 lbs.)次最輕量級(50公斤級)

16、Junior Flyweight/Light Flyweight (108 lbs.)最次輕量級(49公斤級)

17、Mini Flyweight/Minimum Weight (105 lbs.)迷你輕量級(48公斤級)