This thumb support is designed to provide a good support over the thenar eminence and a light support over the wrist. The ulnar side has been designed to prevent squeezing the palmar arch when applying the wrist strap. The splint pocket is made from double woven nylon for maximum durability. The splint is made from a coated flexi-steel that can be adjusted to the patient. The model has an adjustable thumb grip.Size Medium Wrist circumference is 16-18cm