Atomweight (also referred to as light minimumweight, junior strawweight, junior mini-flyweight and pinweight) is a weight class in combat sports.
In women's boxing and junior amateur boxing pinweight is, or has been, a weight class for boxers weighing in under 102lb (before 2003, 45 kg).
In September 2010 the women's class in amateur boxing was partly merged into an extended 45β48 kg light flyweight division, with women weighing less than 45 kg excluded from competition. Pinweight is still defined for junior contests.
Current Champions(Last updated on December 22, 2025)
| Sanctioning Body | Reign Began | Champion | Record | Defenses |
|---|---|---|---|---|
| WBA | November 21, 2025 | Isabel Rivero | 12β3β1 (1 KO) | 0 |
| WBC | October 25, 2025 | Camila Zamorano | 13β0 (1 KO) | 1 |
| IBF | ||||
| WBO | ||||
As of December 22, 2025.[1]
Keys:
Current The Ring world champion
| Rank | Name | Record | Title(s) | |
|---|---|---|---|---|
| bgcolor=gold | C | |||
| 1 | Sumire Yamanaka | 9β1 (3 KO) | ||
| 2 | Camila Zamorano | 13β0 (1 KO) | WBC | |
| 3 | Eri Matsuda | 8β2β1 (1 KO) | ||
| 4 | Esneidy Rodriguez Olmos | 11β0β1 (1 KO) | ||
| 5 | Nao Ugawa | 6β0 (0 KO) |
| year | European | ||
|---|---|---|---|
| 2001 | Elena Sabitova |  Oria Mahmoud | |
| 2002 | |||
| 2003 | Camelia Negrea | ||
| 2004 |  Elena Sabitova | ||
| 2005 | |||
| 2006 | Steluta Duta | ||
| 2007 | |||
| 2008 | |||
| 2009 | Svetlana Gnevanova |
See main article: Atomweight (MMA). The atomweight division in mixed martial arts generally refers to competitors weighing less than 105 lb.
