A standard 6‐piece goniometer set generally contains a variety of transparent plastic goniometers designed for different joints and measurement needs:
360° goniometers in different arm lengths (e.g., 12′′, 8′′, 6′′)
180° pocket goniometer for small/wrist joints
Rulong meter or special 360° tool
Finger flexion/hyper‐extension goniometer