Pain, stiffness, foreign body reaction, loosening of radial head implant and elbow instability are most common causes of failed radial head arthroplasty. Most of these complications are due to overstuffing of radio capitulum joint due to oversized radial head or elbow instability due to undersize of radial head prosthesis. Moreover, radial head implant sizes available to orthopaedic surgeons in the market are based on studies conducted in western world, whereas Asian radial head and medullary cavity measurements are generally smaller. So we decided to conduct study on Indian radial head measurements which can be used for making radial head implants for Asian people.