A swimsuit competition , more commonly now called a bikini contest , is a beauty contest which is judged and ranked while contestants wear a swimsuit , typically a bikini. One of the judging criteria is the physical attractiveness of the contestants. The Big Four international beauty pageants have included examples of such a competition. Bikini contests have sometimes been organised or sponsored by companies for marketing purposes  or to find new models for their products, with the contests being presented as a form of adult entertainment. Swimwear competitions have formed a part of beauty pageants , such as the Miss Earth and Miss World pageants, and sponsors have included commercial brands such as Hawaiian Tropic. Contests have also been held in bars and nightclubs, during intermissions in boxing or wrestling matches and at car shows. Bodybuilding and fitness competitions have evolved to include a bikini division.