A number of orthopedic surgeons use traditional acetate x-rays to pre-operatively template in primary total hip arthroplasty (THA). Templating, when successful can prevent the use of oversized or undersized implants. However, ignoring to template can result in many complications. In Cappagh National Orthopedic Hospital Dublin (CNOH), a number of consultant surgeons do not routinely template; while in some cases only the registrars template routinely. However, inter-observer reliability (IOR) between consultants and registrars is unknown. Our study hopes to answer two key questions: How accurate is pre-operative acetate templating in a National Orthopedic Hospital, and when only trainee registrars template, is the accuracy of templating affected?