Weight classes in boxing are a subject with constantly moving parts. Some organizations add or remove entire divisions. Others refuse to recognize updates altogether.

Beyond that, there are ongoing debates about whether it is fair for a fighter with certain dimensions to compete in a specific weight class. One day they are too big, another they cut too much weight, or they are too tall and have too much reach. And just how fair is it when one athlete sheds 3 kilograms while another drops 13 before a bout?

Let's break down what divisions actually exist in professional boxing.

Where weight classes came from

The first official weight classes in boxing appeared in the late 19th and early 20th centuries. Initially, there were only eight, but new limits were gradually added to give boxers of different builds a chance and to keep heavyweights from fighting lightweights. The primary goal was to ensure fairness in the matchup – to make sure there wasn't too massive a weight gap between fighters, and to turn a brawl and a show into a sport.

By the 1980s, the number of categories had grown to 17 – and has remained stable for most traditional organizations ever since. Of course, discussing divisions isn't just about fighter safety. More categories mean more champions. More champions mean more revenue for belt-sanctioning organizations. Still, there is a limit.

Introducing new weight classes isn't always a step toward bigger profits. Athletes and fans may not even want new divisions. In the case of lighter athletes, their popularity is consistently a fraction of heavyweights.

The 17 weight classes in boxing

Catchweight – what is it?

It is also worth mentioning catchweight. This is not an official division, but an agreed-upon weight category for a specific bout.

There are no set catchweight limits. The teams negotiate the limits before the matchup. They typically do not fit into recognized weight division limits, and organizations do not sanction catchweight bouts.

This happens when an athlete or athletes cannot or do not want to make the limit of a certain division – for instance, when they are planning a move up and need an intermediate step. Or when they want to put on a show and neither wants to drain themselves to fit into a specific category's limits.

A fight at catchweight mostly counts toward the athletes' official records, but it does not advance them in the rankings of existing weight classes.

Bridgerweight: the newest category that has already partially disappeared

The idea of Bridgerweight arose from a simple, observable problem: heavyweights have grown significantly in recent years. Guys weighing 90-95 kg are no longer huge. Guys weighing around 100 kg are no longer the largest in the division either.

Because of this, a chasm opened up between cruiserweight (up to 200 lbs) and true heavyweights – where 220-230 lbs is considered the norm. The number of boxers who didn't fit into cruiserweight but got lost among true giants gradually increased. One can recall the examples of David Haye or Oleksandr Usyk. The former became a heavyweight champion after starting at cruiserweight. The latter won undisputed championships in both divisions. But that success is the exception to the rule.

The WBC tried to solve the problem in November 2020 by announcing a new category – Bridgerweight – with a limit of 224 lbs (101.6 kg). The name comes from Bridger Walker, a 7-year-old boy from the US who defended his younger sister from a dog attack and suffered severe facial injuries. The WBC decided to honor his courage by naming the new category after him.

The first WBC Bridgerweight champion was Oscar Rivas in 2021. But by 2023, the WBC declared the belt vacant after Rivas suffered a retinal injury. Since then, the category has existed and new champions appear, but it has never gained widespread recognition.

The WBA joined in December 2023 – naming the category "Super Cruiserweight" and starting to build its own rankings. But by June 2026, the WBA officially abolished Bridgerweight by a decision at the convention in Orlando. The reason: the category never gained depth – boxers preferred to either stay at cruiserweight or jump straight to heavyweight. Current champions Gadzhimagomedov and Harutyunyan were transferred to neighboring divisions.

Currently, Bridgerweight only exists in the WBC. The IBF and WBO do not have the introduction of a new weight on their agendas. The division didn't catch on, which means the problem with the weight gap wasn't as urgent as it seemed. You could say the experiment didn't work. How long the WBC will continue to support Bridgerweight is an open question.

Zuffa Boxing: 8 divisions instead of 17

The Zuffa Boxing promotion, launched in 2026, took a radically different path. Instead of 17 categories – only eight, without any "super," "first," or "second" intermediate weights.

Heavyweight, cruiserweight, light heavyweight, middleweight, welterweight, lightweight, featherweight, and bantamweight.

This means boxers who competed at "super welterweight" (154 lbs) simply do not exist in the Zuffa system. They are forced to choose between 147 and 160 pounds. Callum Walsh, the first boxer promoted by Zuffa, for instance, moved up to middleweight for his debut in the promotion.

At the same time, Zuffa uses The Ring magazine rankings to determine contenders. One belt – one champion per division. No "super champions," "regular," or "interim" titleholders.

It is important to understand: Zuffa is a promotion, not a sanctioning organization. The WBC, WBA, IBF, and WBO do not recognize their belts and do not cooperate with them. These are parallel systems and future competitors. The promotion introduces the UFC's business model into boxing. Traditional organizations represent the boxing we are all used to.