How to Measure Your Bra Size – Bra Fitting Tips For Every Size

If you’re unable to get to a bra shop for a bra fitting, don’t let that stop you from figuring out your bra size. You won’t believe it till you’re wearing the proper size but a good fitting bra will make you look thinner, feel more confident and will improve your breast heath. Here are the steps to a better you!

  • Have a seamstress’ measuring tape handy. This will allow you to measure the circumference around your breast and rib cage with ease.
  • Start with your rib cage measurement. Place the measuring tape directly below your bust where the underwire would normally rest. Make sure the tape is parallel to the floor and is completely level. When measuring, make sure the tape is nice and snug, similar to how a bra should fit. Record your measurement in inches. 
  • Once you have the measurement, add three inches. This is your band size. Bra manufacturers design bras with these measurements so don’t worry about seeming bigger than you really are.  An exception to this rule is if you measure over 40 inches. In this case, stay within an inch of your measurement. The larger your breasts, the snugger your band should be to support you.
  • Once you have you rib cage measurement you’ll need your cup size measurement. To find this, measure the fullest part of your bust.  You should be wearing a non-padded bra for this part of the measuring. Padded bras will add volume to your bust and will subsequently confuse the measurement.

  • Once you have both measurements, you’ll be ready to learn your bra size!

  • To find your bra size, you must subtract your rib cage measurement from your bust size measurement. (Note that your rib cage measurement is the number before you add the three inches.) For every inch difference there is a letter and that letter is your cup size.

1 inch = A cup
2 inches = B cup
3 inches = C cup
4 inches = D cup
5 inches = E cup (DD)
6 inches = F cup (DDD)
7 inches = G cup  

  • Take your band size and add it to your cup size. Viola! There is your bra size.

Example: Your rib cage measures 31 inches and your bust size measures 36 inches.

Your band size: 31 + 3 = 34. Your band size is 34.

Your cup size: 36 – 31 = 5 inches. 5 inches is an E cup (DD).

Your bra size = 34DD.

Things get a little more complicated if you’re between sizes.

Example: Your rib cage measures 32 inches and your bust measures 36.5 inches.

Your band size: 32 + 3 = 35. Your band size is 35, which doesn’t exist.

Your cup size: 36.5 – 32 = 4.5. 4.5 inches is between a D & E cup.

In this case, your bra size is between a 34E and a 36D.

Even then, sizes differ by not only manufacturer but even by product line. Some bras run big, some run small. This measurement guide is only the beginning and you will likely have to try on several bras before you’ll find the one that fits you best. Bra fitting is a trial and error process at the best of times. Help the process by keeping notes about the fit of the bras you try on so you can tell your fitter. The more information you have about the fit of the band, cup, etc, the better advice the fitter can give you.

It is important to note that the shape of your bust will affect the measurement. Therefore, women with larger busts will have less accurate measurements. If you are plus size, there is less projection from your rib cage. In layman’s terms, your breasts don’t go as out and you’ll likely have to try on the bras to find your exact size.  

This entry was posted in fitness and tagged , , , , , , , , , , , , , , , . Bookmark the permalink.