ProFlex Wrist Flexion and Extension Support. Right Wrist, Large, 7 1/2″ – 8 1/2″ (Measure circumferentially at the wrist, distal to the ulnar styloid process). Designed to position the wrist in neutral and limit wrist flexion, this product allows unrestricted thumb and finger dexterity. Made of lightweight beige elastic material, and machine washable. Indications: Cumulative trauma support, tendonitis and repetitive motion disorders.