The subjects' legs were shoulder-width apart and bore the weight on average. The measuring ruler measures the length of thigh 1 circle at the middle and upper part of thigh 1/3, commonly known as thigh circumference. At this time, be careful not to fold the tape too tightly or too loosely, and measure it close to the skin surface.

Generally speaking, it is the most standard that there are only four small gaps between the legs after the legs are together.