Get to Know Us. Free UK Delivery by Amazon. Show One piece swimsuit woman in blue for Amazon Fashion Our brands. With a little creativity, women's one-pieces can stretch your holiday wardrobe, leaving you extra room in your suitcase for souvenir shopping. Practicality and style with women's one-piece swimwear On our Amazon Fashion pages of one-piece swimsuits you'll find designs that take you from regular exercise swimming to lazing around on holiday beaches.