While in a standing position, measure your under bust line twice. Once relaxed, and once after taking a normal breath. If there is a difference of more than 1 to 2 inches, opt for the larger measurement. The under bust line is directly below the swell of your breasts around your rib-cage. If you have difficulty measuring in a standing position, we suggest bending at the waist at a 90 degree angle. Place the measuring tape in the correct position, stand straight up, and then read your measurement.

Bend at the waist at a 90 degree angle and then measure your top bust. The measuring tape should run across the fullest part of the breasts straight all the way around your body.