A bikini is generally a women's two-piece swimsuit.[2] The design is simple: two triangles of fabric on top cover the woman's breasts and two triangles of fabric on the bottom cover the groin and the buttocks, leaving the woman's midriff exposed.[1] What distinguishes the bikini from other swimsuits is its brevity.[1] The size of the panty can range from full coverage to a revealing thong or g-string design.