Measuring Your Bra (Breast) Size

Measuring Your Bra (Breast) Size

How to correctly measure your bra size

The most common mistake is to choose a bra with a bra cup size which is too small, typically with a bra band size that is too large. For example, a 36C bra is incorrectly chosen instead of a 34E bra size.

You could be one of these women! Have you been measured professionally recently?

This is certainly worth doing both before and after your breast enhancement surgery. You will want to know where your starting point is, bearing in mind that breast enlargement usually enables you to go up to 2 cups sizes larger.

"Around 70% to 85% of UK women wear an incorrect bra size!"

See our selection of before and after breast enlargement photos.

Video Of How To Measure Your Bra Size

Bra Band Size Measurement

Get your bra size measured professionally for FREE!!

It is relatively easy to determine for yourself what bra band size you need. Measure the circumference of your ribcage in inches using a soft tape measure. The measurement should be taken just below the breasts, in the area of the crease; measure all the way around the body. Bra band sizes are available in even numbers of inches 32, 34, 36 etc. If your measurement is an odd number, then add 5 inches to it; if your measurement is an even number, then add 4 inches to it. For example, if your under bust, chest measurement is 29 inches, then you will need to add 5 inches to it to give a band size of 34 inches.

There is a slight caveat to this in that some bra fitters recommend women with bigger breasts add only 2 inches (odd) or 3 inches (even). This typically applies to women who have a cup size of D or larger. So if you have an E cup size, for example, and your under bust, chest measurement is 36 inches, then you may choose a band size of 38 inches, rather than rounding up to 40 inches. This approach is believed to be more comfortable and less prone to back pain caused by supporting larger breasts.

OK, once you have done this, try on a few bras of the measured band size, also the next size up and the next size down. To check if the band size is correct, look at the strap across the back. It should be level and fit firmly but comfortably.

Bra Cup Size Measurement

Cup sizes are more difficult to get right. The actual breast size of a 38D cup is much larger than a 32D. The fact that both are D cups does not matter. There are several ways to measure cup size, however the best way is put a bra on and see if it fits!

First, get a rough idea of what cup size you are. Measure the loose circumference around the chest over the fullest part of the breasts, while standing straight with arms to the side. Measure in inches. This is your bust size measurement. From this measurement, now subtract your under bust, chest measurement taken earlier for your band size measurement. Use your actual, initial chest size measurement and not the band size which you got by adding 4 or 5 inches. After subtracting your chest measurement from your bust measurement, the number you are left with will be your rough cup size measurement. Use the table below to determine your cup size.

Cup SizeBust Size - Chest Size (under the bust) Measurement
AAUnder 1 inch
A1 inch
B2 inches
C3 inches
D4 inches
DD5 inches
E6 inches
F7 inches
FF8 inches
G9 inches
GG10 inches
H11 inches
HH12 inches
J13 inches
JJ14 inches
K15 inches

And Finally!

Your overall bra size will be your band size and your cup size e.g. a 34C will means a band size of 24 inches and a cup size of 'C'. Now this is only a guide, the best way to determine your real bra size is to try on a few different sizes around this guideline and see which fits best. See our guide on bra fitting.