The ratio of height to leg length is approximately 2:1. If a man is 175cm tall, his leg length is approximately 87.5cm. The standard leg length is measured from the beginning of the thigh (i.e. the top of the femur) to the ground. Clinically there is no specific regulation of how many centimeters leg length is normal, if the average person leg length, accounting for 40% to 50% of the total height is very normal. 50% or more, it is a very good proportion of the body, the most coordinated proportion of the body is the golden ratio of 0.618:1, that is, the heel to the navel and the navel above the proportion of the golden ratio. General people simply can not reach. So the general leg length ratio to calculate the total height above 50%, even if the very good leg length ratio. If this ratio is lower than 40%, it is mostly suggestive of problems, possibly due to disproportionate or other developmental deficiencies, which need to be promptly confronted by a doctor to find the cause. It is advisable to consult a doctor as soon as possible if there is any abnormality in the body, so as not to be negligent in order to avoid delays in correcting and treating the problem.