May be adjusted repeatedly for the desired range of flexion or extension. The goniometer lock can be set for gradual dynamic joint extension or fixed into a desired static position. No exposed metal struts. Features soft, foam-padded covers that absorb moisture and help prevent skin maceration. Fits either the left or right arm. Child's size Small orthosis measures 6in (15cm) long, and 5in (13cm) across the mid forearm and mid humerus sections. Adult size orthosis measures 10-1/2in (27cm) long, and 7in (18cm) across the mid forearm and mid humerus sections. Adult size fits most adults. Orthoses generally fit a little more than half the circumference of the supported area.