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Walk into any boxing equipment shop and you will see gloves labelled 8oz, 10oz, 12oz, 14oz and 16oz. If you are new to the sport, those numbers do not mean much. But picking the wrong size can affect your training, your safety and even your development as a boxer.
This guide explains what glove sizes mean, which size you need, and why it matters more than most beginners think.
What Does the Oz Number Actually Mean?
The ounce (oz) measurement refers to the weight of the glove. An 8oz glove weighs 8 ounces (about 227 grams), while a 16oz glove weighs 16 ounces (about 454 grams). The weight difference comes from the amount of padding inside the glove.
More padding means more protection for your hands and for your opponent. It also means a bigger, heavier glove that requires more effort to punch with. Less padding means a smaller, faster glove, but less cushioning on impact.
The ounce rating does not directly indicate the physical size of the glove, but in practice, heavier gloves are also physically larger because they contain more padding material.
The Standard Sizes
8oz gloves are the lightest standard size. They are used in professional fights and some amateur competitions. The reduced padding means faster hand speed but less protection. These are not for everyday training.
10oz gloves sit between competition and training use. Lighter fighters sometimes train in 10oz gloves, and they are used in some amateur competition weight classes. Many boxers use them for pad work when they want to feel closer to fight weight on their hands.
12oz gloves are a popular choice for lighter boxers (under 60kg) who want a training glove that is not as bulky as a 14oz or 16oz. They offer a good balance between protection and speed for smaller hands.
14oz gloves are the most versatile training size for medium-weight boxers (60kg to 80kg). They provide solid protection for bag work and pad work while still feeling manageable. Some gyms allow 14oz gloves for sparring if you are on the lighter end.
16oz gloves are the standard for sparring in most boxing gyms. The extra padding protects your sparring partner from taking too much damage. Heavier boxers (over 80kg) often train in 16oz gloves for all their work, not just sparring.
18oz and 20oz gloves exist but they are specialist items. Some professional heavyweights spar in 18oz or 20oz gloves for extra protection. You are unlikely to need them unless you are very large or training at an elite level.
Choosing the Right Size for Your Weight
Here is a practical guide based on body weight:
Under 45kg (juniors and very light adults): 8oz to 10oz for training, 8oz for competition
45kg to 60kg: 12oz for training, 10oz for competition
60kg to 80kg: 14oz for training, 10oz for competition
Over 80kg: 16oz for training, 10oz to 12oz for competition
For sparring, most gyms in the UK require a minimum of 16oz regardless of your body weight. Always check your gym's rules before buying sparring gloves.
Why Training in Heavier Gloves Helps
Many experienced boxers deliberately train in gloves that are heavier than they need to be. There is a good reason for this.
Heavier gloves make your hands, shoulders and arms work harder during every round. After three or four rounds of pad work in 16oz gloves, your shoulders burn and your arms feel heavy. When you switch to lighter gloves for competition, your hands feel noticeably faster.
It is the same principle as a baseball player warming up with a weighted bat. Train heavy, compete light. The difference in hand speed and endurance is real.
Training in heavier gloves also builds greater punching stamina. Your muscles adapt to the extra resistance, and when that resistance is removed, you can maintain your speed and power for longer.
Hand Size vs Glove Size
The ounce rating covers weight and padding, but gloves also vary in physical fit depending on the brand and model. Two different 14oz gloves can feel very different on your hand.
Some brands run narrow (Cleto Reyes, for example), while others run wider (Twins). If you have larger hands, brands with roomier interiors tend to be more comfortable. If your hands are smaller, a more compact glove gives better control and feel.
Always try gloves on with hand wraps before buying. Your wraps add significant bulk, and a glove that fits perfectly on a bare hand can feel cramped once you are wrapped up.
If you are buying online without trying them on first, check the brand's sizing recommendations and read reviews from people with similar hand sizes. Most reputable boxing retailers, including BoxFit, can advise on fit if you reach out.
Lace-Up vs Velcro: Does It Affect Size Choice?
The closure type does not change the size you need, but it does affect the fit around your wrist.
Lace-up gloves allow for a more precise, custom fit. You can lace them tighter or looser depending on your preference. They distribute pressure more evenly around the wrist.
Velcro (hook and loop) gloves are quicker to put on and take off but offer a less adjustable fit. The strap wraps around a fixed area and you get one or two positions at most.
For training, Velcro is far more practical. You can adjust mid-session and you do not need help putting them on. Lace-ups are generally reserved for competition or for fighters who have someone in their corner to lace them up.
When to Own Multiple Pairs
Once you are training regularly and doing different types of sessions, having more than one pair of gloves makes sense.
A common setup for a serious amateur boxer is:
One pair of 16oz gloves for sparring
One pair of 12oz or 14oz gloves for bag work and pad work
The sparring gloves stay cleaner (shorter rounds, less sweat) and maintain their padding better because they are not hammered against the bag three times a week. The bag gloves take the daily beating and can be replaced more frequently without breaking the bank.
Some boxers add a third pair of lighter gloves (10oz) for speed work and light technical sessions. This is not essential but it is a nice option if your budget allows.
Competition Glove Rules
In amateur boxing in the UK, glove weight for competition is governed by the governing body (England Boxing, for example). The standard is 10oz for most weight classes, though this can vary for youth competitions.
Competition gloves must be approved by the sanctioning body and are often supplied at the event. You do not usually get to use your own gloves in amateur competition, so do not spend a lot on competition gloves until you are at a level where that changes.
Professional boxing uses 8oz or 10oz gloves depending on the weight class and the commission overseeing the fight.
Key Takeaways
Pick your training glove weight based on your body weight and the type of training you are doing. Heavier is generally better for training because it builds strength and endurance. Always spar in 16oz unless your gym says otherwise. Try before you buy, and wear wraps when you do.
If you are unsure about sizing, get in touch with the team at BoxFit. We have fitted thousands of pairs of gloves and we can point you toward the right size and brand for your hands and your training goals.
