Under bust measurement
HOW TO MEASURE FOR YOUR BRA
Proper bra measurement is crucial in ensuring that you have the best-fitting undergarments. Too many women spend money on purchasing well-fitting clothes but spend less attention and time on what they wear under them. Bras that are too small can cause back pains and shoulder aches, and bras that are too large will not provide enough support.
Measure under the bust to determine the band size,
then to measure across the fullest part of the bust to calculate the cup size.
Determining your Bra Band Size
Underbust +0: Place the measuring tape directly under your bust, parallel with the ground. Breathe normally, and measure after you’ve exhaled. Take your band size in inches, and round to the nearest even number. It should be as snug as possible but without digging. Use the chart below to find your band size. Remember that inches do not equal size, meaning 34 inches does not equal a size 34 band.
Bra Band Size Conversion
Determining Bra Cup Size
To measure your cup size, measure your bust at the fullest part of your bust, wearing an unlined, non-padded bra (not over your clothes!), making sure that the measuring tape is parallel with the ground.
Your cup size is proportional to band size, which means that your cup size is actually the difference (in inches) between your band size and the fullest part of your bust. 1” is an A cup, and each additional inch increases the cup size alphabetically.
Bra Cup Size Conversion
Use the difference in inches between your brand size
and the fullest part of the bust.
How to tell if It’s the Right Fit
your current bra size.
To go down a sister size: reduce your band size by 2, but take your cup size up by one (e.g. 36C’s sister size is a 34D)
To go up a sister size: increase your band size by 2, but go down one cup size (e.g. 36C’s sister size is a 38B)