According to iSport, the size of a boxing ring varies based on the type of competition and the relevant governing body in each case. Typical ring sizes range from 16 feet by 16 feet square, to 24 feet by 24 feet square.
The sizes of boxing rings may differ even within a particular type or level of boxing. There are no set ring dimensions at the professional level, though governing bodies at this level, including USA boxing, do have strict guidelines. Olympic boxing ring dimensions are based on the guidelines provided by the Amateur International Boxing Association. The size stipulated for international competition in this context is 20 feet by 20 feet square.