Measuring the cup size is trickier than the band size; even with a measurement it is better to try on different bras and find out experimentally which one fits.
Have someone measure you again, this time the measuring tape goes
on top of the fullest part of your breasts. If you already own
a well-fitting non-padded bra, you can wear it while taking this
measurement as long as it doesn't 'flatten' your breasts (which
would make an illusion of a smaller cup size). Record this number,
and find the difference between that, and the band-size number.
Remember again, bra measuring is not exact science. And how could
it be when women's breasts come in so many different shapes and
sizes? Usually one breast is bigger than the other, they might
sag, etc. So the fitting room tells you the truth; not the tape
measure. You have to try the bra on. If it first right, that's
your bra size even if the tape measure told you different.
Of course, many department stores and high-end specialty stores have very knowledgeable women available to assist you and they are experienced in how to measure for a bra. It can be uncomfortable for you to have someone adjusting your breasts, but they are professionals and they really do want you to be pleased with your bra fitting experience. They know if you are satisfied with the bra fitting they provide, you’ll not only make future purchases in their store, you’ll tell your friends to ask for a personal bra fitting of their own.
Calculating bra cup size is easy, using this method and the chart below:
Difference between Band Size and Bust Size |
Cup Size |
| 0 to .5 inch | AA |
| .5 to 1 inch | A |
| 1 inch to 2.5 inches | B |
| 2.5 inches to 3.5 inches | C |
| 3.5 inches to 4.5 inches | D |
| 4.5 inches to 6 inches | DD or E |
| 6 inches to 7 inches | DDD or F |
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