There are 17 weight classes in professional boxing, and five major recognised belts for each of the divisions: The WBA (World Boxing Association), WBC (World Boxing Council), IBF (International Boxing Federation), WBO (World Boxing Organization) , and The Ring.
There are four recognised major bodies in boxing: the WBA, WBC, IBF, and the WBO. The Ring title is awarded by American boxing magazine, The Ring, and has been awarded since 1922.
The mixture of belts and champions means that there is only a rare occasion when a class can be fully unified to produce an undisputed champion.
Boxers often fight across weight classes to maximise their chances of success, with boxers stepping up and down various classes.
Here is every champion in each weight class for women's boxing.
Heavyweight
- WBA: Claressa Shields
- WBC: Claressa Shields
- IBF: Claressa Shields
- WBO: Claressa Shields
- The Ring: N/A
Light heavyweight
- WBA: Danielle Perkins
- WBC: N/A
- IBF: Sarah Scheurich
- WBO: Vacant
- The Ring: N/A
Super middleweight
- WBA: Franchon Crews-Dezurn
- WBC: Franchon Crews-Dezurn
- IBF: Lani Daniels
- WBO: Lani Daniels
- The Ring: Lani Daniels
Middleweight
- WBA: Kaye Scott
- WBC: Kaye Scott
- IBF: Desley Robinson
- WBO: Desley Robinson
- The Ring: Vacant
Super welterweight/Junior middleweight
- WBA: Mikaela Mayer
- WBC: Mikaela Mayer
- IBF: Oshae Jones
- WBO: Chantelle Cameron
- The Ring: Vacant
Welterweight
- WBA: Lauren Price
- WBC: Lauren Price
- IBF: Lauren Price
- WBO: Mikaela Mayer
- The Ring: Lauren Price
Super lightweight/Junior welterweight
- WBA: Katie Taylor / Edith Soledad Matthysse (Interim)
- WBC: Vacant
- IBF: Katie Taylor
- WBO: Katie Taylor
- The Ring: Katie Taylor
Lightweight
- WBA: Stephanie Han
- WBC: Caroline Dubois
- IBF: Elif Nur Turhan
- WBO: Caroline Dubois
- The Ring: Vacant
Super featherweight/Junior lightweight
- WBA: Alycia Baumgardner
- WBC: Caroline Veyre
- IBF: Alycia Baumgardner
- WBO: Alycia Baumgardner
- The Ring: Alycia Baumgardner
Featherweight
- WBA: Amanda Serrano
- WBC: Tiara Brown / Dina Thorslund (Interim)
- IBF: Nina Meinke
- WBO: Amanda Serrano
- The Ring: Amanda Serrano
Super bantamweight/Junior featherweight
- WBA: Vacant
- WBC: Skye Nicolson
- IBF: Vacant
- WBO: Vacant
- The Ring: Vacant
Bantamweight
- WBA: Dina Thorslund
- WBC: Dina Thorslund
- IBF: Dina Thorslund
- WBO: Dina Thorslund
- The Ring: Dina Thorslund
Super flyweight/Junior bantamweight
- WBA: Nataly Delgado
- WBC: Adelaida Ruiz
- IBF: Irma Garcia
- WBO: Mizuki Hiruta
- The Ring: Mizuki Hiruta
Flyweight
- WBA: Gabriela Fundora
- WBC: Gabriela Fundora / Kenia Enríquez (Interim)
- IBF: Gabriela Fundora
- WBO: Gabriela Fundora
- The Ring: Gabriela Fundora
Light/Junior flyweight
- WBA: Estefany Alegria Osorio / Melisa Meraz (Interim)
- WBC: Lourdes Juarez
- IBF: Estefany Alegria Osorio
- WBO: Estefany Alegria Osorio
- The Ring: Vacant
Minimumweight/Mini flyweight
- WBA: Sarah Bormann
- WBC: Yokasta Valle / Umi Ishikawa (Interim)
- IBF: Kim Clavel
- WBO: Sarah Bormann
- The Ring: Vacant
Atomweight
- WBA: Isabel Rivero
- WBC: Camila Zamorano
- IBF: Sumire Yamanaka
- WBO: Gabriela Timar
- The Ring: Vacant
You can read more on how the world championship system works in boxing here.