To ensure a perfect wrist guard fit, measure hand circumference at the knuckles and match to the sizes listed below: * S 7.5 - 8.0 inches - M 8.0 - 9.0 inches - L 9.0 - 10.0 inches * Extra wide palm splint for greater coverage and energy disbursement - High-density, impact-resistant, replaceable splints positioned on front and back of wrists for support * Sweatsaver brow-wipe on back of hand - Terry cloth inside lining for comfort - Reinforced double-stitching throughout