Start by measuring under bust line twice. Once relaxed, and once after taking a normal breath. If there is a difference of more than 1 - 2 inches, opt for the larger measurement.

• 从测量下胸围开始，量两次。一次是放松状态下量，一次是吸了气之后量。如果两次测量有超过1到2英尺的差别，请取大的尺寸。