Wrist Hand Thumb Orthosis S-L (6996) This durable orthosis comfortably restricts motion of the wrist, hand and thumb. The specially formulated thermoplastic provides cast-like rigidity without the discomfort associated with traditional casting methods. It is indicated for use in post cast fracture removal, severe strains and sprains. Right or Left Sizing: SizePalm Width S 7.5 – 8 cm M 8 – 8.5 cm L 8.5 – 9.5 cm