How To Measure Your Breast Size


To determine your correct bra and cup size, you will need a tape measure, in inches. Then, CLICK HERE for our computer calculator and follow the instructions.

If you prefer to do it out by hand, read and follow the instructions below. You will need a tape measure (preferably paper) in inches, and a pencil. (Optimally, you should be wearing your most comfortable bra when the following measurements are done, though this is not mandatory.)

There are 2 variables we need to determine to correctly find your bra and cup size. These variables are your frame size and your chest+breast size. Keep in mind, however, that determining your bra and cup size is no an exact science. If you find you should be wearing a 34 C, but a 32 B fits you better, obviously get the more comfortable one!



1. Determine Frame & Bra Size

The frame size is the diameter around your chest JUST BELOW your breasts. Using the tape measure, measure around your ribcage directly under your breasts. There should be no breast tissue measured while determining your frame size. Record your results on this form that can be printed.

To determine the bra size, add 5 to this number. If the number you get is odd, round up to the next even number. For example, if your frame size is 26 inches, when you add 5 to this you get 31 inches. You should therefore round up to the even number which is 32 inches (since bras only come in even numbers). This is your bra size, 32 inches.

2. Determine Breast Size

The next measurement goes around the chest over and including the fullest part of your bust (usually at the level of the nipples). Technically, you should take this measurement while wearing a comfortable bra. This is the diameter of your chest+breast. Record this number on the form.

3. Calculate Cup Size

Now, take the chest + breast size number, and subtract your bra size number. Then use the table below to determine your cup size.

[ad#inline amazon ebay]Difference (line 5 minus 4)

Cup Size
0 to 1/2 inch [AA]

1/2 to 1 inch [A]

1 to 2 1/2 inches [B]

2 1/2 to 3 1/2 inches  [C]

3 1/2 to 4 1/2 inches [D]

4 1/2 to 6 inches [DD] (E) 

6 to 7 inches [DDD] (F)

7 to 8 inches [G]

4. Example

Let’s assume your frame size is 31 inches, your bra size is therefore 36 inches (31 + 5 = 36 inches). In addition, assume you measured your chest+breast size at 40 inches. Now, take your chest+breast size (40), and subtract your bra size (36). You get 4 inches as the difference. Using the table above, you find that anyone with a difference between 3 1/2 to 4 1/2 inches (including 4) has a cup size D. Your correct bra and cup size is therefore 36 D.

Read more about the Top 3 Best Breast Enhancements

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Comments on How To Measure Your Breast Size Leave a Comment

October 19, 2010

Pamela @ 5:44 pm #

Thanks for this easy to follow method to measure breast size.

October 20, 2010

Beth @ 1:28 pm #

Agreed Pamela. This is a helpful site. I have always wanted to have breast implants but after reading the absolute horror stories on this site there is no way I will subject myself to that especially at my age.

I will be buying the Breast Success. Has anyone had any personal experience with it?

October 21, 2010

Lilianna @ 8:37 am #

I have used Breast Success and it increased my breast size an entire cup size. I really was not expecting that but that is what my results were. I have tried some of the other ones with varying results. I will always use breast success.

– Lily

October 22, 2010

Sarah @ 3:07 am #

We are glad that you like the site. We felt it was very important to inform women about their options. Doctors can be pushy and appear to have an agenda. Not all doctors but enough of them and few doctors will tell you to go take herbs. lol

Breast success is the breast enhancement of choice from our subscribers. Here is a quick link to the page about breast success

Best wishes,

October 30, 2010

Suzanne @ 8:56 pm #

Excellent post.I want to thank you for this informative read, I really appreciate sharing this great post. Keep up your work.

November 6, 2010

Brittany @ 4:59 am #

Thank you thank you for this website. It has helped me make important choices in my life.


March 21, 2011

Melissa @ 1:14 am #

I just sent this post to a bunch of my friends as I agree with most of what you’re saying here and the way you’ve presented it is awesome.

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