Leg length inequality affects 65-70% of the population, therefore it is very important to use the appropriate methods for evaluating and measuring the discrepancies. This paper aims to analyze the existing measuring methods used by medical doctors in orthopedics and a new length measurement system, which belongs to the authors, highlighting the advantages and disadvantages of each method. A comparative analysis is described in order to assist the end-users in choosing the optimal measuring method for each patient, thus increasing the quality of life.