A weight class is a measurement weight range for boxers. The lower limit of a weight class is equal to the upper weight limit of the class below it. The top class, with no upper limit, is called heavyweight in professional boxing and super heavyweight  in amateur boxing. A boxing match is usually scheduled for a fixed weight class, and each boxer's weight must not exceed the upper limit.
Unified Weight Classes – MMA – Association of Boxing Commissions
In January , the World Boxing Council , World Boxing Association and the International Boxing Federation reached an agreement to standardize the names of professional boxing's then 17 weight divisions. The World Boxing Organization has yet to adopt these standard class names. These are commonly known today as the "traditional divisions," which were basically the only weight classes throughout the early 20th Century, before the numerous "super," "junior" and "light" classes were added. See also , 15 Feb Los Angeles Herald article re: necessity for revision to universal 8 divisions: . London-based private club amends 12 Queensberry Rules , modifying with new augment rules with nine specific criteria, such as designating role of officials; devised a system of scoring bouts; and enabled referee to determine who won.
Beginner boxers should mainly focus on their posture and find a suitable fighting style that will best match their personality. Keep in mind that these categories are made for your safety and you should only fight with opponents that have more-or-less the same height and weight as you, for a fair game. According to the general guidelines of boxing, a weight class represents a measurement weight range for athletes. Usually, the upper limit of a weight class equals the lower limit of the immediate class after it.
Some of the men also take part in WSB, which is not currently available to women. Competitors wear vests; women wear headguards, but since these have been removed for men for senior and elite competitions. The judges will score each round, and at the end of the bout the boxer who is deemed the winner by the majority of judges will win the bout.