a knee brace having a femur support section pivotally connected to a tibia support section is provided . the femur support section has a medial frame and a lateral frame , sandwiched between width adjustment plates . the width adjustment plates hold the lateral and medial frames , and are held together by retainer bolts and nuts . the retainer bolts and nuts can be loosened to permit the lateral frame and the medial frame to slide against the width adjustment plates . thus , the space between the lateral frame and the medial frame can be adjusted according to the size of the wearer &# 39 ; s leg .