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 done 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 in order 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: N/A
- WBC: Claressa Shields
- IBF: Vacant
- WBO: Vacant
- The Ring: N/A
Cruiserweight
- WBA: N/A
- WBC: N/A
- IBF: Vacant
- WBO: Vacant
- The Ring: N/A
Light heavyweight
- WBA: Che Kenneally
- WBC: N/A
- IBF: Lani Daniels
- WBO: Claressa Shields
- The Ring: N/A
Super middleweight
- WBA: Franchon Crews-Dezurn
- WBC: Franchon Crews-Dezurn
- IBF: Savannah Marshall
- WBO: Vacant
- The Ring: Savannah Marshall
Middleweight
- WBA: Claressa Shields
- WBC: Claressa Shields
- IBF: Claressa Shields
- WBO: Claressa Shields
- The Ring: Claressa Shields
Super welterweight/Junior middleweight
- WBA: Terri Harper
- WBC: Ema Kozin
- IBF: Femke Hermans
- WBO: Ema Kozin
- The Ring: Natasha Jonas
Welterweight
- WBA: Lauren Price
- WBC: Ivana Habazin
- IBF: Natasha Jonas
- WBO: Sandy Ryan
- The Ring: Lauren Price
Super lightweight/Junior welterweight
- WBA: Katie Taylor
- WBC: Katie Taylor
- IBF: Katie Taylor
- WBO: Katie Taylor
- The Ring: Katie Taylor
Lightweight
- WBA: Katie Taylor
- WBC: Katie Taylor
- IBF: Beatriz Ferreira
- WBO: Rhiannon Dixon
- The Ring: Katie Taylor
Super featherweight/Junior lightweight
- WBA: Alycia Baumgardner
- WBC: Alycia Baumgardner
- IBF: Alycia Baumgardner
- WBO: Alycia Baumgardner
- The Ring: Alycia Baumgardner
Featherweight
- WBA: Amanda Serrano
- WBC: Skye Nicolson
- IBF: Vacant
- WBO: Amanda Serrano
- The Ring: Amanda Serrano
Super bantamweight/Junior featherweight
- WBA: Nazarena Romero
- WBC: Yamileth Mercado
- IBF: Ellie Scotney
- WBO: Ellie Scotney
- The Ring: Ellie Scotney
Bantamweight
- WBA: Cherneka Johnson
- WBC: Dina Thorslund
- IBF: Miyo Yoshida
- WBO: Dina Thorslund
- The Ring: Dina Thorslund
Super flyweight/Junior bantamweight
- WBA: Clara Lescurat
- WBC: Asley Gonzalez Macias
- IBF: Irma Garcia
- WBO: Mizuki Hiruta
- The Ring: Vacant
Flyweight
- WBA: Gabriela Celeste Alaniz
- WBC: Gabriela Celeste Alaniz
- IBF: Gabriela Fundora
- WBO: Gabriela Celeste Alaniz
- The Ring: Gabriela Celeste Alaniz
Light/Junior flyweight
- WBA: Jessica Nery Plata
- WBC: Jessica Nery Plata
- IBF: Evenlyn Nazarena Bermudez
- WBO: Evenlyn Nazarena Bermudez
- The Ring: Vacant
Minimumweight/Mini flyweight
- WBA: Seniesa Estrada
- WBC: Seniesa Estrada
- IBF: Seniesa Estrada
- WBO: Seniesa Estrada
- The Ring: Seniesa Estrada
Atomweight
- WBA: Eri Matsuda
- WBC: Tina Rupprecht
- IBF: Sumire Yamanaka
- WBO: Eri Matsuda
- The Ring: Vacant
You can read more on how the world championship system works in boxing here.