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Added May 26, 2014

How to Determine Bra Size

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Right bra size. What do all those letters mean? Is a cup size 8 ounces?

1. Using a measuring tape, determine the number of inches around your chest, just below your breasts.

2. Add 5 inches if it is an odd number; add 4 inches if it is an even number. This is your bra measurement.

3. To find out what size cup you need, measure around the fullest part of your breasts.

  • If the two numbers are the same, you need an AA-cup.
  • If the two numbers differ by 1 inch, you need an A-cup.
  • If the two numbers differ by 2 inches, you need a B-cup.
  • If the two numbers differ by 3 inches, you need a C-cup.
  • If the two numbers differ by 4 inches, you need a D-cup.
  • If the two numbers differ by 5 inches, you need a DD-cup.



Claudia's first measurement, around her chest, just below her breasts, was 28 inches. Adding 4 inches gives her 32 inches. This is her bra measurement. Claudia's second measurement, around the fullest part of her breasts was 34 inches. The difference between the two numbers (in this case, 32 and 34) is 2 inches, so she needs a B-cup. Her right bra size is 32B.

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comments so far
Posted August 12, 2014
i got 32aa and my bra size is 28aa
Posted April 06, 2014
I don't have a bra measurement. I just get them in sizes; small, medium, or large. But I know that it would be 30something A.
Posted December 06, 2013
34c that doesn't sound right but ok
Posted October 23, 2013
I agree with ibchoc my bra type is an a36 it's small
Posted October 23, 2013
My mum says I'm ready for a bra but it doesn't sound right! I think I'm a 35-C but it feels wayyyyyyy to big... ??
Posted August 06, 2013
I used this method and i got the same exact bra size as i already wear.
Posted July 03, 2013
What if I'm not even using cups? What if I'm still in a sports bra, but my breasts are still pretty big???????
Posted July 03, 2013
i was 30 and 34 so i was a d cup doesnt sound right though
Posted July 23, 2013
I got same as claudia lol!!
Posted July 04, 2013
Random question: Do you add 4 or 5 when you measure your cup size? Because if that's not right, then all of humanity has some explaining to do... -_-
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