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The CMC Thumb Support aids in the treatment of arthritis and instability of the CMC (carpometacarpal) joint. The unique design of the internal padded stay in combination with the outer elastic strap provides focal compression at the base of the thumb and helps stabilize the CMC joint.
BODY PART MEASURED: Wrist Circumference
X-Small - under 5 1/2"
Small - 5 1/2" to 6 1/4"
Medium - 6 1/4" to 7"
Large - 7" to 7 3/4"
X-Large - over 7 3/4"