For example, if your band was 34 inches and bust was 37 inches, the number you’d get is three. This number will correlate with a cup size starting with the number one, equaling A.

For every cup size, Genie notes the approximate weight of the wearer's breasts in terms of birds and animals. B-Cup: five cockatiels. C-Cup: a newborn polar bear. D-Cup: a wigeon duck.