The wrist band is effectively to straighten and immobilize the full finger knuckles while protecting the finger and hand. for trigger finger, mallet finger, broken or fractured finger, sprained knuckles, rheumatoid arthritis, tendonitis , post stroke finger curling, post-operative care and finger pain relief. Features - Color: Black. - Material: Nylon. - Size: About 18x14.7x0.4cm. - This support brace is fabricated from thick nylon for maximum durability. - This thumbs splint provides mild to moderate support to the wrist, metacarpal region, and particularly the thumb. - The strong adhesive tape of the thumb wrap makes it stay in position for secure, which is easy to put on or take off. - The adjustable size to fit most people. - Warm Tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand Thank you