Size: For men or women, this support has been designed with hook fasteners in order to create a customized fit for most body types. To determine the correct size, measure around the waist at the navel and refer to the chart below. Small/medium: 29-39 inches. Traditional trouser sizing does not apply. When to Use: This quality Futuro Stabilizing Back Support is designed to help provide support to a stiff, strained or aching back .Use when support is needed for daily activities or exercise, or to help promote proper back alignment. Washing: Close all fasteners prior to washing. Hand wash with mild soap in warm (not hot) water. Rinse well and air dry. Do Not: machine wash, tumble dry, dry clean, or use bleach or fabric softeners. How to Wash: 1. Open main straps and detach side cinch straps. Center support along the lower back, with the support cushion pads on either side of the spine and curved edge of panel pointing downward. 2. Wrap the main straps snugly around the waist and secure the hook fastener over the stomach. 3. Pull the side cinch straps forward and secure them along the front panels of the support. Adjust the placement of the cinch strap fasteners to achieve the correct level of support for your needs.