Zipper closure Material:97% polyester and 3% spandex,stretchy One shoulder side split design backless back zipper Small: Bust:Relax 33.9 Stretched 36.2---Waist:Relax 25.2 Stretched 27.6---Hip:Relax 33.9 Stretched 36.2---Length:Relax 54.3 Medium: Bust:Relax 35.8 Stretched 38.2---Waist:Relax 27.2 Stretched 29.5---Hip:Relax 35.8 Stretched 38.2---Length:Relax 55.1 Large: Bust:Relax 37.8 Stretched 40.2---Waist:Relax 29.1 Stretched 31.5---Hip:Relax 37.8 Stretched 40.2---Length:Relax 55.9