Thumb Spica Features:

Lightweight, perforated outer foam shell with a cool, cotton-terry liner. Elastic, circumferential, contact closure straps for proper positioning of splint. Ideal for soft tissue injury to the thumb, arthritis, tendonitis, deQuervain's Syndrome.

Specifications:

Small / Medium = Fits most women and smaller men
Large / X-Large = Fits most men and larger women