SHAPERX Women Double Heavy Duty Steel Boned Mesh Corset Waist Training Shaper partial waist tape ( waist measurement can stretch a bit when worn) Double steel boning: 18 x 6mm wide steel spiral bones (very flexible) 6 x 12mm wide flat steel bones (flexible) Front STEEL stiff busk Steel boned floating modesty panel: 5.5" wide (14cm) Regular black "shoe" style lace