The three dimensions of a woman usually refer to her bust, waist and hips. When measuring, it is necessary to pay attention to body relaxation and try to make the soft ruler close to the skin. 1. Bust measurement: When measuring bust, women should pay attention to body relaxation, use the soft ruler close to the skin, through the plane of the nipple around the chest for a circle, the measured value is the bust. 2. Waist circumference measurement: the subject takes the standing position, stands straight, feet 30cm apart, arms around the chest, takes the horizontal position of the mid-axillary line at the midpoint of the line between the lower edge of the ribs and the iliac crest as the measuring point, makes markings at the bilateral measuring points, so that the lower edge of the tape measure passes through the bilateral measuring points and the value measured is the waist circumference. 3. Hip circumference measurement: When measuring the hip circumference, women should make the tape measure close to the skin, and wrap the tape around the hip at the level of the hip bone bulge for one week, and the measured value is the hip circumference. When measuring the circumference of women, in order to make the results more accurate, you can measure three times to get the average value.