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Bra Cup Size

How to Determine Your Bra Cup Size?
See also: Band Size
  Measure cup size (bust size)
The cup size is the volume of the bra cup (breast size). Cup size is indicated with one or to letters. If your bra size is 34C, C is your cup-size.
Cup volume (cup size) is increasing when the band size is decreasing (and that the cup volume is decreasing when the band size is increasing). Because of this, more cup sizes can fit your breasts, if the band size changes. Read more about sister sizes and see sister size chart here.

How to measure and determine your cup size:

To find the right cup size, you will first need to measure the bust. Then you will find the cup size by calculating the difference between the bust size and the band size.

1. Measure your bust

To measure your bust size, simply measure with a measuring tape (inches or cm) around your body over the fullest part of your breasts (for most women it will be right over the nipples - see illustration). You can do this with naked breasts, but you will get a better result if you do it wearing a bra.

Make sure that the measuring tape is horizontal and tight. Keep your arms down and close to the body while measuring (get help from somebody else, if possible).

Note your measurement, and simply go to step 2 (below).
How to measure cup size (bust size)

2. Determine your cup size

Find the difference between the bust size and the band size (bust size - band size). Then use the table below to find the right cup size (both inches and cm):

US/UK (inches):

Difference (inches) 0 <1 1 2 3 4 5 6 7 8
Cup size U.S. AA A B C D DD DDD/E (F) F (G) G (H) H (I/J)
Cup size UK/Australia A A B C D DD E F G H

EU/FR/IT (cm):

Difference (cm) 0 <2,5 2,5 5 7,5 10 12,5 15 17,5 20
Cup size EU A A B C D E F G H I
Cup size FR A A B C D E F G H I
Cup size IT A A B C D E F G H I

Next step: Band size

Congratulations, you have now found your bra cup size. To find your band size, click here!
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