size: Measure wrist circumference: 13.9cm - 26.6cm Thumb Circumference: Fits up to 12.5cm Universal design fits right or left handed This brace comes in a universal size, but please note it may not fit extra-large thumbs. Package: 1pc Thumb Support Bracket How does it work? This neoprene thumb support is the ideal support for helping the thumb and wrist recover from sprains, tendonitis or arthritis. This thumb brace helps the area heal by partially immobilizing the thumb with a splint, while also applying gentle pressure to the entire wrist area to help reduce pain. feature Helps relieve pain from various thumb injuries prevent further injury support weak muscles Provides support for the wrist area Neoprene material provides compression and support Universal size can be adjusted to fit most Disclaimer: This is general advice only. If you are unsure of your medical condition or have a sensitivity to neoprene or any other material, it is recommended that you consult a physician.