The Criss-Cross Back Support provides moderate support for the back. It features four flexible anti-roll stays and double-pull elastic tension straps for added abdominal support. The criss-cross design helps focus pressure where most back pain occurs. It also features tapered front panels for added patient comfort and movement. It is manufactured from white premium quality elastic and long lasting contact closures. Small: 24-30” (circumference of hip) Medium: 30-36” (circumference of hip) Large: 36-42” (circumference of hip) X-Large: 42-48” (circumference of hip) 2X-Large: 48-52” (circumference of hip) 3X-Large: 52-56” (circumference of hip) 4X-Large: 56-60” (circumference of hip)