An orthopedic device for immobilizing a thumb includes a main body having a wrist end and a thumb end. A wrist strap is located on the wrist end of the main body for fastening the wrist end of the main body to the wrist of a user, and a thumb strap is located on the thumb end of the main body for fastening the thumb end of the main body to the wrist of a user. The thumb strap is adapted to encircle a joint of a user's thumb. When the wrist and thumb straps are fastened, the main body substantially immobilizes the thumb.