Atomweight (also referred to as light minimumweight, junior strawweight, junior mini-flyweight and pinweight) is a weight class in combat sports.
Boxing
In women's boxing and junior amateur boxing pinweight is, or has been, a weight class for boxers weighing in under 102 pounds (46 kg) (before 2003, 45 kg).
In September 2010 the women's class in amateur boxing was partly merged into an extended 45–48 kg light flyweight division, with women weighing less than 45 kg excluded from competition. Pinweight is still defined for junior contests.
Women's professional champions
Current Champions (Last updated on May 19, 2026)
| Sanctioning Body | Reign Began | Champion | Record | Defenses |
|---|---|---|---|---|
| WBA | November 21, 2025 | Isabel Rivero | 13–3–1 (1 KO) | 1 |
| WBC | October 25, 2025 | Camila Zamorano | 14–0 (1 KO) | 1 |
| IBF | April 7, 2026 | Sumire Yamanaka | 10–1 (3 KO) | 0 |
| WBO | December 26, 2025 | Gabriela Timar | 16–2 (1 KO) | 0 |
Current The Ring world rankings
As of May 19, 2026.1
Keys:
- C Current The Ring world champion
| Rank | Name | Record | Title(s) |
|---|---|---|---|
| C | vacant | ||
| 1 | Sumire Yamanaka | 10–1 (3 KO) | IBF |
| 2 | Camila Zamorano | 14–0 (1 KO) | WBC |
| 3 | Esneidy Rodriguez Olmos | 13–0–1 (1 KO) | |
| 4 | Shiori Yotsumoto | 3–0 (2 KO) | |
| 5 | Aldana López | 15–0 (0 KO) |
Women's Amateur Champions
| year | World | European |
|---|---|---|
| 2001 |  Elena Sabitova |
 Oria Mahmoud
|
| 2002 |  Mary Kom |
|
| 2003 |  Camelia Negrea
| |
| 2004 | Elena Sabitova
| |
| 2005 | Mary Kom
| |
| 2006 | Steluta Duta
| |
| 2007 | ||
| 2008 | Mary Kom |
|
| 2009 | Svetlana Gnevanova
|
Mixed Martial Arts
The atomweight division in mixed martial arts generally refers to competitors weighing less than 105 lb.
External links
External links
- Coming into effect September 2010: AIBA, Technical & Competition Rules 2011, Appendix K
- In effect 2002–August 2010: AIBA, Technical & Competition Rules, Rule VIb