Bi.tencon Steel Boned Underbust Corset with Buckles Black Waist Training Bustier Xl Size run small, please choose one size larger than usual wear. Please see our size chart in the pictures area and choose mostly according to your waist size. Material: 90% Polyester and 10% Spandex Fully adjustable criss cross ribbon laced back, please try to adjust it to be more fit for your body. 12 flexible steel bones to give shape and support along with a strong steel busk fastening. 2 Pieces, including 1 Corset, and 1 Matched G Strings