一共分17个级别：
1.重量级 Heavyweight (201磅以上 91.25公斤级以上)
2.次重量级 Cruiserweight (200磅 90.8公斤级)
3.轻重量级Light Heavyweight (175磅 79.45公斤级)
4.超中量级 Super Middleweight (168磅 76.27公斤级)
5.中量级 Middleweight (160磅 72.64公斤级)
6.超次中量级 Junior Middleweight/Super Welterweight (154磅 69.91公斤级)
7.次中量级 Welterweight (147磅 66.74公斤级)
8.超次中量级/超轻量级 Junior Welterweight/Super Lightweight (140磅 63.56公斤级)
9.轻量级 Lightweight (135磅 61.29公斤级)
10.超次轻量级/超羽量级 Junior Lightweight/Super Featherweight (130磅 59.02公斤级)
11.羽量级 Featherweight (126磅 57.2公斤级)
12.超次羽量级/超最轻量级 Junior Featherweight/Super Bantamweight (122磅 55公斤级)
13.最轻量级 Bantamweight (118磅 53.57公斤级)
14.最轻量级/蝇量级 Junior Bantamweight/Super Flyweight (115磅 52.21公斤级)
15.蝇量级 Flyweight (112磅 50.84公斤级)
16.超次蝇量级/轻蝇量级 Junior Flyweight/Light Flyweight (108磅 49.03公斤级)
17.迷你级 Mini Flyweight/Minimum Weight (105磅 48公斤级)
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