Boxing weight classes keep fights fair by matching boxers of similar size. Professional boxing has 17 main divisions, from minimumweight at 105 pounds to heavyweight with no upper limit, and each division can have several world champions at once. This guide explains every weight class, how the title belts work, and what it means to be an undisputed champion.
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Filipino boxers have won world titles across many of these divisions over the decades, most famously Manny Pacquiao. For fight news and results, follow our boxing news and fight results.
What are the boxing weight classes?
Each division has a maximum weight that a boxer must make at the official weigh-in. The limits below are recognized by the four major sanctioning bodies, although the division names can differ slightly between organizations.
| Division | Weight limit | Other names |
|---|---|---|
| Minimumweight | 105 lb (47.6 kg) | Strawweight, mini flyweight |
| Light flyweight | 108 lb (49.0 kg) | Junior flyweight |
| Flyweight | 112 lb (50.8 kg) | |
| Super flyweight | 115 lb (52.2 kg) | Junior bantamweight |
| Bantamweight | 118 lb (53.5 kg) | |
| Super bantamweight | 122 lb (55.3 kg) | Junior featherweight |
| Featherweight | 126 lb (57.2 kg) | |
| Super featherweight | 130 lb (59.0 kg) | Junior lightweight |
| Lightweight | 135 lb (61.2 kg) | |
| Super lightweight | 140 lb (63.5 kg) | Junior welterweight |
| Welterweight | 147 lb (66.7 kg) | |
| Super welterweight | 154 lb (69.9 kg) | Junior middleweight |
| Middleweight | 160 lb (72.6 kg) | |
| Super middleweight | 168 lb (76.2 kg) | |
| Light heavyweight | 175 lb (79.4 kg) | |
| Cruiserweight | 200 lb (90.7 kg) | |
| Heavyweight | No limit (over 200 lb) |
The WBC also recognizes a bridgerweight division between cruiserweight and heavyweight, with a limit of 224 pounds (101.6 kg). It sits outside the standard 17 divisions, since not every organization uses it.
Why “super” and “junior” mean the same thing
Some organizations name the in-between divisions “super,” while others use “junior” or “light.” A super lightweight and a junior welterweight are the same 140-pound division, for example. The weight limit is what matters, not the name used on the belt or in the record books.
From eight divisions to 17
Boxing once had just eight traditional divisions: flyweight, bantamweight, featherweight, lightweight, welterweight, middleweight, light heavyweight, and heavyweight. The in-between “super” and “junior” divisions were added over the following decades, so fighters would not have to give up so much weight to compete for a title.
Olympic and amateur boxing use a different, smaller set of weight classes. The 17 divisions here apply to professional boxing, where world titles are on the line.
How do weigh-ins work?
Boxers usually weigh in the day before a fight. If a boxer comes in over the division limit, the fight may still go ahead at a catchweight, an agreed weight above the limit, but there are consequences, especially in title fights. Weigh-ins are supervised by the local boxing commission, such as the Games and Amusements Board for fights held in the Philippines, together with officials from the sanctioning body when a title is at stake.
A champion who misses weight usually loses the title on the scale, and a challenger who misses weight cannot win the belt even with a victory. Some organizations, such as the IBF, also check fighters on the morning of the fight to limit how much weight they regain overnight.
Key takeaway
Because boxers weigh in the day before, the fighter in the ring is often several pounds heavier than the official weight. That rehydration is legal, and it’s one reason fighters often move up a division as they get older.
The four major boxing belts
Unlike most sports, boxing has no single governing body. Four main sanctioning organizations each crown their own world champion in every division, so one division can have up to four world champions at the same time.
| Organization | Full name | Founded |
|---|---|---|
| WBA | World Boxing Association | 1921, as the National Boxing Association; renamed in 1962 |
| WBC | World Boxing Council | 1963 |
| IBF | International Boxing Federation | 1983 |
| WBO | World Boxing Organization | 1988 |
The WBC’s green belt is one of the most recognizable in the sport. Each organization keeps its own rankings and decides who its champion must fight next.
Mandatory challengers
Each sanctioning body names a top-ranked contender, known as the mandatory challenger, that its champion must face within a set period. A champion who doesn’t take the mandatory fight can be stripped of the title, which is one reason belts change hands outside the ring.
Interim, regular, and super titles
Some organizations award extra titles in the same division. An interim title can be created when a champion is injured or inactive, and the WBA has used labels such as “super” champion for a titleholder who also holds other major belts, alongside a separate “regular” champion. These extra titles are part of why boxing can seem to have so many champions.
Moving between weight classes
Boxers often change divisions during their careers, usually moving up as they grow older and stronger. A boxer who wins world titles in more than one division is called a multi-division champion, one of the strongest marks of a great career.
Because boxers in different divisions rarely fight each other, outlets such as The Ring and ESPN publish pound-for-pound rankings. These compare the best boxers across all weight classes, as if size were not a factor. World title fights are also scheduled for 12 rounds, compared with fewer rounds for most non-title bouts.
What does undisputed champion mean?
An undisputed champion holds all four major world titles, from the WBA, WBC, IBF, and WBO, in the same division at the same time. It’s the highest achievement in the sport, because it removes any argument about who the best fighter in the division is.
| Term | Meaning |
|---|---|
| World champion | Holds at least one major belt |
| Unified champion | Holds two or three of the four major belts |
| Undisputed champion | Holds all four major belts at once |
| Lineal champion | Beat the previous recognized “true” champion, a status often linked to The Ring magazine’s title |
Undisputed status often doesn’t last long. Holding four belts means meeting four sets of mandatory challenger demands, so undisputed champions often give up a belt or move up a division.
Filipino world champions and the weight classes
The Philippines has a long history of world champions in the lighter divisions, where Filipino fighters have traditionally been strongest. Manny Pacquiao is the only boxer in history to win world titles in eight divisions, from flyweight up to light middleweight. Nonito Donaire and Donnie Nietes are among the other Filipino multi-division champions, each winning world titles in four weight classes.
The lighter divisions are still where Filipino contenders are most active. Miel Fajardo challenges Masamichi Yabuki for the IBF flyweight title on November 26 in Tokyo, on a card where Zyvyr Medecilo also fights for the WBA minimumweight title.
How weight classes and belts affect betting
Weight class shapes how fights tend to go. Lighter divisions tend to feature high punch output and more fights that go to the scorecards, while heavier divisions tend to produce more knockouts, which affects method-of-victory markets. Our boxing scoring guide explains how decisions work, and our boxing betting guide covers the markets for title fights. Betting is for adults aged 21 and over.
