How to Measure Your Bra Size

Wearing the wrong bra size can ruin an otherwise perfect outfit. Its not rocket science, but so many women wear the wrong size.  Do you have wrinkling in the cups, underwire poking the sides of your breasts, a band that rides up, cup spillage, slipping straps, or a bra that hikes up when you lift your arms? You may need a new size. You should be measured every year or two since, sadly, things change, don’t they, Ladies? Weight gain or loss, pregnancy, a new workout, and aging all play a factor.

measure your bra size


While braless (or wearing a non-padded bra,) measure around the bottom of where the band hits – directly under your bust. The measuring tape should be level and very snug. Round to the nearest whole number. If the number is even, add four inches. If it’s odd, add five. Your band size is the sum of this calculation. (So if you measured 32 inches, your band size is 36. If you measured 33 inches, your band size is 38.)

Step Two: CUP SIZE

Wrap the measuring tape somewhat loosely around the fullest part of your busy (at nipple level). Round to the nearest whole number. Subtract your band size from your bust measurement and refer to chart. Example: 37 inches (bust) – 34 inches (band) = 3 inches. That’s a 34C.

Under 1 inch AA Cup
1 inch A Cup
2 inch B Cup
3 inch C Cup
4 inch D Cup
5 inch DD Cup
6 inch DDD or F Cup

A few more tips:

Adjust the band. The back of the bra should be level with the front.

Make sure the bra is not too tight. Slide two fingers underneath the straps and under the band.

Put on a close-fitting shirt over the bra. If the cups are puckering or your breasts bulge, you need to try a different size.

If you need to go down a cup size for fit, go up one band size, and vice versa. For example, if a 34C is too big for you, move to a 36B.

Choose a bra that fits perfectly when secured on the outermost hook. Then when the bra loosens over time, you can make the band taut by moving towards the tightest hook.




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About Melissa

Written by Melissa Angert, editor of this fashion blog and author of Girlymama. You can also find her on Twitter as Melissa Angert. She is a mom of 3 living in Providence.


  1. After years of measuring myself wrong and having so called experts do it wrong, I got measured at Nordstroms after having my baby a couple years ago and I LOVED IT. Finally, I am wearing the right bra size and it is so comfortable. My girls have never been happier.

  2. Thank you for your show its amazing funny and also learning about bras.