拳击比赛是根据运动员的体重，划分成不同的级别分别进行的。职业拳击比赛分为8个体重级别，具体可以分为17个级别。
（1）Heavyweight (over 190 lbs.)重量级(86公斤级以上)
（2）Cruiserweight (190 lbs.)次重量级(86公斤级)
（3）Light Heavyweight (175 lbs.)轻重量级(79公斤级)
（4）Super Middleweight (168 lbs.)超中量级(76公斤级)
（5）Middleweight (160 lbs.)中量级(73公斤级)
（6）Junior Middleweight/Super Welterweight (154 lbs.)初中量级/超次中量级 (70公斤级)
（7）Welterweight (147 lbs.)次中量级 (67公斤级)
（8）Junior Welterweight/Super Lightweight (140 lbs.)初次中量级/超轻量级 (64公斤级)
（9）Lightweight (135 lbs.)轻量级(61公斤级)
（10）Junior Lightweight/Super Featherweight (130 lbs.)初轻量级/超次轻量级 (59公斤级)
（11）Featherweight (126 lbs.)次轻量级 (57公斤级)
（12）Junior Featherweight/Super Bantamweight (122 lbs.)超最轻量级(55公斤级)
（13）Bantamweight (118 lbs.)最轻量级(53公斤级)
（14）Junior Bantamweight/Super Flyweight (115 lbs.)超次最轻量级(52公斤级)
（15）Flyweight (112 lbs.)次最轻量级(50公斤级)
（16）Junior Flyweight/Light Flyweight (108 lbs.)最次轻量级(49公斤级)
（17）Mini Flyweight/Minimum Weight (105 lbs.)迷你轻量级(48公斤级)
