The Comfort Cool D-ring Thumb and Wrist Splint has the same features as the Wrist Splint with the added benefit of thumb support. Ideal for skier's thumb, gamekeeper's thumb and de Quervain's syndrome.  Wrist and thumb metal inserts can be bent as needed and can be removed as the condition improves. Thumb tip can be trimmed for greater freedom of movement. To size, measure circumference around the palm.