Measuring The Bra Band Size
Wearing a non-padded bra, measure around the bottom of the band in inches, directly under the underbust. Then, hold firmly the measuring tape and try to keep it as level as possible. Be careful to not put a finger between the skin and the bra because this may not provide you with an accurate measurement.
If the number is uneven, round up the measurement to the closest number, for example, If you have 32.5, the measurement should be 33.