An orthotic brace includes a proximal support section pivotally connected to a distal support section, and each having a medial frame and a lateral frame connected to width adjustment plates. At least one angle adjusting component provided in the lateral or medial frames allows angular adjustment of the brace. The width adjustment plates include lateral and medial slots through which fixing members pass to engage the respective frame portions. This permits the space between the lateral frame and the medial frame to be adjusted according to the size of the wearer's body part. Proximal and distal shells are adjustably positioned on the width adjustment plates via a series of positioning holes axially arranged along the shells which selectively engage a fixing member passing through a positioning slot on the width adjustment plates. This allows for the shells to be both axially adjusted and positioned along the width of the brace.