Professional wrestling weight classes

Welterweight is a weight class in combat sports. Originally the term welterweight was used only in boxing, but other combat sports like muay Thai, taekwondo, and mixed martial arts also use it for their own weight division system to classify the opponents. If used, welterweight is typically between lightweight and middleweight.

thumb|right|Heavyweight boxers Andrew Golota (on the left) vs. [[Kevin McBride at Madison Square Garden]] Heavyweight is a weight class in combat sports and professional wrestling.

Middleweight is a weight class in combat sports.

weight class used in boxing, kickboxing, and mixed martial arts

Openweight, also known as Absolute, is an unofficial weight class in combat sports and professional wrestling. It refers to bouts where there is no weight limit and fighters with a dramatic difference in size can compete against each other. It is different from catch weight, where competitors agree to weigh in at a certain amount without an official weight class. While weight classes are usually mandatory now, openweight competition was the norm for combat sports since antiquity and continues into the modern day.