Champion Khabib Nurmagomedov Russia .

Weight limits in women's MMA mostly follow the Unified Rules' limits, but organizations that recognize women's championships usually only have titles at the lower end of the table. Calvin Kattar isn’t going to try to earn his title shot by talking, but he has a message for featherweight champ Alexander Volkanovski if he’s truly looking for the best contenders in the division Lightweight Division Interim champion Justin Gaethje United States . MMA became legal in the state of New York on April 12, 2016. Four years later, UFC 12 introduced weight classes: heavyweight, for … Bantamweight Division Vacant . While a huge size advantage did not always determine the outcome of a fight, weight classes nonetheless debuted in 1997, when fighters at UFC 12 in Dothan, Alabama were … Fast Facts: The UFC hosts most of the top-ranked MMA fighters in the world. See a complete list of UFC title holders for each weight division. The WEC (World Extreme Cagefighting) merged with the UFC in 2010. Current Champions include Jon Jones,Amanda Nunes,Kamaru Usman,Stipe Miocic and Zhang Weili. See a complete list of UFC title holders for each weight division. Flyweight Division Vacant . Best of UFC Best of UFC P4P P4P Divisional Rankings Divisional Rankings Champions Champions Tickets Tickets Fighters Fighters PFL PFL Ariel Helwani's MMA Show Ariel Helwani's MMA Show Ariel & The Bad Guy To keep up with current fights, go to the MMA schedule page . Betting; Vegas; Live Casino; The List of all current UFC champions in each weight class. The UFC currently has Twelve weight classes. HEAVYWEIGHT (265 pounds and under) The UFC currently has eight weight-divisions for the men and four for the women.

Click here for a look at the current and all-time UFC champions.

We've taken a look through the UFC's multiple different weight classes to bring you the various rankings and respective champions. There is no consistency in terms of what happens when a ranked fighter changes weight classes.

Featherweight Division Alexander Volkanovski Australia .

In combat sports where champions are decided by a challenge, the lineal championship of a weight class is a world championship title held initially by an undisputed champion and subsequently by a fighter who defeats the reigning champion in a match at that weight class. Welterweight Division Kamaru Usman Nigeria . UFC, for example, recognizes women's titles in the strawweight, flyweight, bantamweight and featherweight classes.

It was anarchy. Four years later, UFC 12 introduced weight classes: heavyweight, for fighters 200 pounds and above, and lightweight, for those 199 pounds and under.

Seriously, up until the late-1990’s, any fighter could fight any other fighter.

The UFC began in 1993 with fighters of all sizes competing against each other. The gym helped produce champions in three of the UFC's original four weight classes.

The UFC began in 1993 with fighters of all sizes competing against each other. But, did you know that weight classes didn’t exist in UFC throughout its early history? The UFC began in 1993 with fighters of all sizes competing against each other.

At the time of the UFC's inception in 1993, MMA was unsanctioned in the US and did not include any weight classes.

We've taken a look through the UFC's multiple different weight classes to bring you the various rankings and respective champions.