Boxing gloves come in a variety of sizes and are typically weighed in ounces. In both the amateur and professional ranks of the sport, general rules set the size of gloves each competitor must wear during competition. These rules require a fighter to wear gloves that correspond to his weight category.
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Amateur 165 lbs. Division and Over
Amateur fighters who compete in and between the middleweight and super-heavyweight divisions wear 12-oz. boxing gloves during their bouts. The most that a middleweight boxer is allowed to weigh when entering the ring is 165 lbs. However, the weight category ranges from 153 to 165 lbs. Therefore, the 12-oz. glove rule actually covers all boxers who weigh more than 152 lbs., which is the limit of the weight class below middleweight.
Amateur 152 lbs. Division and Under
Amateur boxers who fight in the welterweight division and lower use 10-oz. gloves. This rules also applies to boxers who weigh 152 lbs. or less. The lowest weight class in men's amateur boxing is the light flyweight category, which has a limit of 106 lbs. The 10-oz. gloves are slightly lighter than 12-oz. gloves, and the inside padding is more compacted.
Professional Super-welterweight and Over
As a boxer enters the professional ranks, the gloves he wears during competition decrease in size. Most amateur boxers have not yet reached the point of full physical maturity. Amateurs wear larger gloves as a precaution to prevent younger bodies and minds from suffering trauma. In professional boxing, fighters in the heavier divisions compete in only 10-oz. gloves. This rule generally applies for any boxer who weighs more than 147 lbs.
Professional Welterweight and Under
Professional boxers who competes in any class up to and including the welterweight division wear 8-oz. gloves during a match. The lowest weight category in professional boxing is 105 lbs., which is called mini-flyweight, straw weight or minimum weight. Fighters in these categories are usually much faster than their heavier counterparts. The smaller gloves allow a boxer to strike and respond with increased speed.