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How to Size a Bra • Bra Size Calculator • Do-It-Yourself Bra Sizing • Your "Sister" Bra Sizes • Bra Sizing for
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Bra Fitting Perfect Bra Fit Check List Bra Fit Tips & Tests Solutions to Bra Fit Problems How to Put on a Bra In-Store Bra Fitters Lingerie Fitting, The 5 Questions We Hear Most

Bra Sizes (D & Larger) Universal Cup Sizing Explained Compare Bra Brands & Sizing Converting Foreign Bra Sizes

Anatomy of a Bra Bra Anatomy Index Cups Seamed Cups Underwires Bra Bands Center Panel (Bridge) Sides/Back Bra Hooks Bra Straps

Classify Your Breasts Breast Separation Upper Breast Fullness Breast Position Breast Shape Apex (nipple) Direction Additional Considerations

Bra Styles Pros & Cons of Bra Styles Bra Cup Styles

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Bra Fitting Infographics Bra Measuring & Fitting Infographic UCS Infographic The History Of Shapewear Choosing the Perfect Bridal Lingerie

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Tomima's Bra Fitting Tip: "You're a smart person. Since you'll be wearing the bras, you're better off taking a few minutes to understand what a perfect fitting bra should look and feel like, and recognize the signs if your bra is the wrong size for you."

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What are the best-selling bras in your size?
To find out, enter your bra size (32C, 36DD, etc.)

Bra Fitting: Finding Your Perfect Size

Bra Fitting Infographic

A handy reference guide to measuring and fitting for the proper bra size. See the bra fitting infographic.

Welcome to the HerRoom Bra Size Calculator. First, we need to tell you up front, that any bra sizing system where a tape measure is involved will not be totally accurate. The reason? A lot of factors can affect your measurements – the bra you’re wearing, the firmness of your breasts, the broadness of your back, the narrowness of your shoulders. These factors and more can give you a false bra size once you’ve measured yourself.

For women who wear a bra size 38D and larger, using this measuring system as a bra size calculator is frankly a mistake. Instead you should be bra sizing starting with your base bra size and tweaking this size based on what you don’t like about your current bra size (check out our Poor-fitting Bra Examples.)

So, here’s the bra size calculation using a measuring tape. But, be aware that it is not always accurate. And, HerRoom encourages you to watch our “Bra Sizing Video” for tips on accurate measuring.

Already Know Your Bra Size?

See what other women in the same size are buying. Enter your bra size
below to find out!
(ie: 32C, 36DD, etc.)

How to measure and fit a bra in three easy steps

Warning! After a 38 band size, the band size should be the closest higher even number to your actual measurement. So 41.5" is a 42 band. A 41" measurement is a 42 band.

STEP 1: Measure for band size:

Keeping the measuring tape parallel with the ground, measure around your bra directly under your bust after expelling all air from your lungs - you want this measurement to be as small as possible. Round all fractional measurements to the nearest whole number.

Band Size Chart

If Your Measurement is:

Your Band Size is:

After a 38 band size, the band size should be the closest higher even number to your actual measurement So, 41.5" is a 42 band. A 41" measurement is a 42 band.

STEP 2: Measure for cup size:

Standing straight, with your arms at your side, measure at the fullest part of your bust (while wearing a non-padded bra) making sure the measuring tape is parallel with the ground and not binding.
Round all fractional measurements to the nearest whole number.

STEP 3: *Calculate your bra size:

Subtract your band measurement (step 1) from your cup measurement (step 2). Generally, for each inch in difference, the cup goes up by one size. See the cup size conversion chart below.

Example:
Step 1: 34" under measurement = 36" band size
Step 2: 39" over measurement
Step 3: 39" - 36" = 3" or C Cup Size
Your Size is probably a 36C

The cup size calculation starts falling apart at 4 inches larger than your band size, and if you have droopy or pendulous breasts, your measurement will not be accurate.

If The Difference Is:	Your Standard Cup Size Is:	Your *Universal Cup Size™ Is:
0" to 1/2" (1.3cm)	AA
1/2"- 1" (2.6 cm)	A
2" (5.1 cm)	B
3" (7.6 cm)	C
3" (7.6 cm)	C
4" (10.2 cm)	D	D1
5" (12.7 cm)	DD * or E *	D2
6" (15.2 cm)	DDD * or F *	D3
7" (17.8 cm)	G *	D4
8" (20.3 cm)	H *	D5
9" (22.9 cm)	I *	D6
10" (25.4 cm)	J *	D7

Universal Cup Sizing™

* Cup sizes larger than a D are called different letters by different brands (a DDD cup size in one brand can be called an E or F in other brands). So know your Universal Cup Size and you can find your correct size in any brand at HerRoom. Learn how to find your Universal Cup Size™

*Important Note: this measuring system tends to become less accurate as the cup sizes go above a D. Additionally, some manufacturers name larger cup sizes differently. See "The Proper Bra Measuring Techniques for Plus-Size Women".

Next Section: Do It Yourself Bra Sizing »