band size

measure your ribcage, directly under the bust. if your measurement is an even number, add 4 inches. if your measurement is an odd number, add 5 inches.

example: if your ribcage measurement is 29" + (5) = 34 band size

cup size

measure loosely around the fullest part of your bust. subtract this bust measurement from your band size.

example: if your bust measurement is 35" and your band size is a 34, you wear an A cup