Nylon outer material is lined with a plush foam for exceptional patient comfort. Dual stays support both the palmer surface of the wrist and the extensor surface of the thumb. Thumb support adjusts with hookandloop closure. Three forearm straps secure with loop lock closure for a high level of compression. Left, Medium. 8" (20.3 cm) L, 61/28" (16.520.3 cm)Circumference.ORT18210RS. 18210RS. Medline Medline Wrist and Forearm Splint with Abducted Thumb,Small.