The bikini line delineates Young teen micro g string bikinis part of a woman's pubic area to be covered by the bottom part of a bikini, which means any pubic hair visible beyond the boundaries of a swimsuit. As bikinis leave most of the body exposed to potentially dangerous UV radiation, overexposure can cause sunburnskin canceras well as other acute and chronic health effects on the skin, eyes, and immune system. Costumes are regulation "posing trunks" bikini briefs for both men and women. Although child-sized bikinis appeared in the s, in many European countries, swimsuits below size 11 are commonly not sold with a separate top, but in the United States, Britain, and Canada, it has often been considered unacceptable for girls in late childhood ages 7—11 to go topless. Young teen micro g string bikinis winners earned titles like Miss Body Beautiful, Miss Physical Fitness and Miss Americana, and also presented trophies to the winners of the men's contest. For the island group, see Bikini Atoll.