A boxing weight class chart is useful only when it tells you how the divisions, weigh-ins, and bout rules work together. In the U.S., the number on the scale is only part of the story: the commission, the sanctioning body, and the event format can all change what that number really means. I'm laying out the standard pro divisions first, then the rules that decide whether a bout is actually fair, legal, and bookable.
The main things to know at a glance
- The standard U.S. pro chart runs from mini flyweight at 105 lb to heavyweight with no upper limit.
- Female pro bouts use the same weight classes as male pro bouts, but the rounds are shorter.
- Pro and amateur weigh-ins follow different rules in the U.S., so the chart is not interchangeable.
- Weight-difference allowances and catchweight contracts can change whether a matchup is allowed.
- The chart is a starting point, not the whole rulebook.
The pro chart most U.S. commissions use
I use the U.S. commission version of the chart here because that is the version most readers actually need when they compare fight cards, title eliminators, and local events. The labels can shift slightly from one sanctioning body to another, but the weight limits below are the backbone of modern professional boxing. Female professionals use the same weight classes as male professionals under ABC guidance; the main rule differences show up in rounds and gloves, not in the class list.
| Division | Weight limit | Notes |
|---|---|---|
| Mini flyweight | Up to 105 lb (47.6 kg) | Often called minimumweight or strawweight; 8 oz gloves. |
| Light flyweight | Over 105 to 108 lb (47.6 to 49.0 kg) | 8 oz gloves. |
| Flyweight | Over 108 to 112 lb (49.0 to 50.8 kg) | 8 oz gloves. |
| Super flyweight | Over 112 to 115 lb (50.8 to 52.2 kg) | Often called junior bantamweight; 8 oz gloves. |
| Bantamweight | Over 115 to 118 lb (52.2 to 53.5 kg) | 8 oz gloves. |
| Super bantamweight | Over 118 to 122 lb (53.5 to 55.3 kg) | Often called junior featherweight; 8 oz gloves. |
| Featherweight | Over 122 to 126 lb (55.3 to 57.2 kg) | 8 oz gloves. |
| Super featherweight | Over 126 to 130 lb (57.2 to 59.0 kg) | Often called junior lightweight; 8 oz gloves. |
| Lightweight | Over 130 to 135 lb (59.0 to 61.2 kg) | 8 oz gloves. |
| Super lightweight | Over 135 to 140 lb (61.2 to 63.5 kg) | Often called junior welterweight; 8 oz gloves. |
| Welterweight | Over 140 to 147 lb (63.5 to 66.7 kg) | 8 oz gloves. |
| Super welterweight | Over 147 to 154 lb (66.7 to 69.9 kg) | Often called junior middleweight; 10 oz gloves. |
| Middleweight | Over 154 to 160 lb (69.9 to 72.6 kg) | 10 oz gloves. |
| Super middleweight | Over 160 to 168 lb (72.6 to 76.2 kg) | 10 oz gloves. |
| Light heavyweight | Over 168 to 175 lb (76.2 to 79.4 kg) | 10 oz gloves. |
| Cruiserweight | Over 175 to 200 lb (79.4 to 90.7 kg) | 10 oz gloves. |
| Heavyweight | Over 200 lb (90.7 kg) | No upper limit; 10 oz gloves. |
I read the ladder this way: the lighter classes move in small jumps because a few pounds can change the matchup fast, while the heavier classes give the body more room. A few organizations also recognize bridgerweight between cruiserweight and heavyweight, but because it is not universal, I treat it as an exception rather than part of the baseline chart. That leads straight into the rules around weigh-ins, because the limit only matters if the boxer can make it under the right timing.
How U.S. commissions turn the chart into a rulebook
According to the ABC Regulatory Guidelines, the class name is only part of the decision. The commission also cares about when the weigh-in happens, how close the fighters are allowed to be, and whether the bout is booked at a standard limit or at a catchweight.
Weigh-in timing
- The weigh-in is generally held within 24 hours of the event at a time and place approved by the commission.
- If the weigh-in is 12 to 24 hours before the bout, the boxer can be re-weighed two hours before the start, and the final overage cannot be more than 10 lb over the contract weight.
- If the weigh-in is under 12 hours before the bout, the boxer must make the contract weight; more than 2 lb over can cancel the contest unless the bout is renegotiated.
- The promoter provides the scale, but the commission has to approve it and keep the process controlled.
When I am evaluating a card, this is the first thing I check. A boxer who misses the timing can lose the fight before the first bell, even if the style matchup looks good on paper.
Weight-difference allowances and catchweights
The guideline table also sets weight-difference allowances for matched bouts. Those numbers are separate from the class limits, and commissions can waive them in writing if the bout needs special handling.
- 3 lb - mini flyweight through bantamweight.
- 4 lb - super bantamweight through featherweight.
- 5 lb - lightweight and super lightweight.
- 7 lb - welterweight through light heavyweight.
- 12 lb - cruiserweight.
- No limit - heavyweight.
A catchweight is useful for salvaging a card or making a high-value matchup, but I never treat it as a normal division. It is an exception, and exceptions always carry more risk for one side.
Read Also: Flyweight Limits - Why the Number Changes in Combat Sports
Bout length and glove size
- Male professional bouts can go up to 12 rounds of 3 minutes.
- Female professional bouts can go up to 10 rounds of 2 minutes.
- Female professional weight classes are the same as male professional weight classes under ABC rules.
- Gloves are generally 8 oz through welterweight and 10 oz from super welterweight upward.
Those details matter more than most casual fans think. A fight can be at the right weight and still not be apples-to-apples if the rounds, glove size, or class-specific rules change the pace of the contest. Once you understand that, the amateur rulebook makes a lot more sense.
Why amateur boxing in the U.S. does not use the same chart
I have seen too many people compare a pro card and a USA Boxing bracket as if they follow the same playbook. They do not. USA Boxing's 2026 rule book revisions say boxers must weigh in on the day they box, the daily weigh-in has zero tolerance for overweight, and a boxer who misses the limit is disqualified.
| Rule area | Professional boxing | USA Boxing national competition |
|---|---|---|
| Weigh-in | Usually within 24 hours of the bout | Day-of daily weigh-in |
| Overweight tolerance | Depends on the contract and commission | Zero tolerance; miss the limit and you are disqualified |
| Rounds | Up to 12 x 3 minutes for men, up to 10 x 2 minutes for women | Elite and Youth: 3 x 3 minutes; Junior: 3 x 2 minutes |
| Officials | Commission-approved weigh-in process | Same-gender officials in a private location |
| Chart structure | Standard pro divisions with catchweight exceptions | Age and weight limits in the Rules Reference Chart |
At national tournaments, the daily weigh-in lasts one hour or until completed, and only the maximum weight limit is controlled. That is a stricter system than most casual fans expect, but it keeps the amateur side simple: make the limit, or do not box. That difference is exactly why I never use the pro chart as a shortcut for amateur matchmaking.
Common mistakes I avoid when reading a matchup
- Mixing up a class limit with a contract weight. The number in the division name is not always the number written on the bout agreement.
- Treating a catchweight like a normal division. It is a negotiated exception, not a standard slot on the chart.
- Using the pro chart for youth or junior events. Amateur boxing has its own age-based structure.
- Ignoring gloves and round length. A bout at the same weight can still feel very different if the equipment or rounds change.
- Assuming bridgerweight is universal. Some organizations recognize it, but it is not a fixed part of every rule set.
The fastest way to avoid these mistakes is to read the chart with the rulebook beside it, not by itself. Once the class, the weigh-in, and the event format line up, the matchup starts to make sense for real.
What I check before I trust the number on the scale
- Is this a professional bout or an amateur event?
- Is the fight booked at a division limit or at a catchweight?
- When is the weigh-in, and how close is it to the first bell?
- Which commission or rulebook is controlling the event?
- Are there any extra checks, glove changes, or bout-length changes tied to the class?
If those answers line up, the number on the scale means what you think it means. If they do not, I treat the matchup as unfinished business, because the class alone never tells the whole story.
