Generally, an odd number band measurement is rounded up to the next even number; for example a 37 inch band measurement would be rounded up to a 38. (motherandchildhealth.com)
For example, if you measure at a 38 inch band size and a 36 inch cup size, the difference equals 2, which would make you a B cup size. (lovingmomentsbras.com)
Domack points to a half - inch band of pronounced striping on the readout: our target. (discovermagazine.com)