Lower bust: In the case of natural breathing, circle the lower edge of the breast to the back with a soft ruler, and the soft ruler is flush with the ground to get the lower bust size (unit: cm, the same below).
Upper bust: the upper body leans forward 30 ~ 45 (the bigger the breast, the greater the inclination angle). Circle the plump part of the breast to the back with a soft ruler to get the upper bust size.
To be more accurate, the circle is averaged three times. ?
Use the upper bust-lower bust to get the bust difference, which is the cup. Cups are represented by codes: 10cm=A, 12.5cm=B, 15cm=C, and the grade difference is increased by 2.5cm. ..