About an average of more than 60% of women does not wear the right bra size.

Do you feel totally fine with your bra size? That’s great. You won’t need a bra size check. But if you do? 

Check our measuring bra guide »

ThirdLove invented half-cups
AA to I cups Shop now
⭐ Herroom AA - M cups Shop by your size
⭐ Amazon Best Rated Bras Shop Now

» How to measure a small cup?
» A cup vs B cup | What’s the difference?
» Small bra size chart
» What are bra sister sizes?
» Measure bra band | band too tight or loose?
» Bras for sagging breasts
» Why you should hand wash your bras?

Dobreva front-closure T-Shirt Push Up Adds 1 Cup (AA-DD cups) | See details at Amazon.com


How to measure a small cup?

measure small bra sizes
Your bra size may change several times

I became a true bra lover only after knowing my own sizes. With my measurements and the use of a small bra size chart, I learned which bra sizes would fit me (many women fit more than just one bra size).

Many women with smaller breasts may not ever have had a properly fitted bra in their lives before. I meet a lot of women who wear a bra cup A who’d be better off with an AAA or AA cup. But it can also be that they might need a B cup instead of the A cup they’re wearing. Or even a C cup. Cup sizes can be quite close together.

photo on how to measure band size
photo on how to measure cup size

Read more about measuring a small cup »


A cup vs B cup

Thirdlove invented ½ cups | AA-I cups See their collection at Thirdlove.com

Here’s the story of the cup volume every woman should realize.

For example, the bras 40A, 42AA, and 38B all have the same cup volume.

So, you can’t just compare cup sizes. You cannot just say that a cup B is bigger than a cup A. Because changing your band size automatically has an effect on the cup volume.

How will I know if I’m an A or B cup? Read more »


Small bra size chart

NuBra The Feather-Lite Super Padded Light Adhesive Bra  AA-C cups | See NuBra collection at Amazon.com

As you realize bra sizes can be very close together. Really very close. So it can be, depending on the band size you choose, you can need an AA, A, or B cup.

That’s why us petite should always check a bra size chart including all small sizes.

Use this size chart to check AAA-B cups. Want to check bigger sizes? Do check our bra size calculator.


What are bra sister sizes?

different bras laying flat illustrating the blog on bra sister sizes
Bras with different numbers might fit the same woman!

There is only one way to find out your best bra size. Try both sizes.

Decide over time what your preferences are. I own bras in 34A, 34AA and 36AAA and the bras all fit me just fine. Depending on the brand and the model of the bra I deliberately choose different sizes.

Always remember that when going up or down a band size, your cup size will change too. Bras in 34A and 36A do not have the same cup size. The bras 34A and 36AA do have the same cup size. Read more about bra sister sizes here »

See tapes for body measurements at Amazon.com


Band too tight or too loose? | How to measure your bra band size?

photo on how to measure band size
Measure the underbust, write down the inches or centimeters


The best bras for sagging breasts

The pull of gravity works on any size of breasts. On small breasts as well.

What bra styles should you look for? And what bras you’d better avoid? Read the full blog »

In this video by Herroom you’ll learn what bra features work well for saggy breasts.

Video 3.55 | Best Bra Styles for Deflated and Pendulous Breasts

Handful has a collection of sports bras, bottoms, tops with a built-in bra, and bra pads. Great on women with smaller breasts, uneven breasts, and after mastectomy of one or two breasts | See the collection Handful at Amazon.com


Why you should hand wash your bra?

dog in a washing machine

Your bra is a delicate treasure. And we expect from it to support us throughout the day (and nights). So why should we preferably hand wash bras?

The elastic fiber of our bra needs the best of care from us! Because a bra that is taken good care of will give you longer and better support.

Warner’s Women’s Elements of Bliss Wirefree Lift Bra A-D cups | See details at Amazon.com

Did you know regularly washing is important for the elastic fiber to regain its shape? Read the full post about ‘How to handwash your bra’»


Index brasforsmallcups.com

learn how to measure a small cup size »
find out your true bra size today!
more about aaa cup bras (and smaller) »
more about aa cup bras »
more about a cup bras »
mastectomy bras »
blogs on bras and more »


Go to bra size calculator and determine your best bra size


Amazon AA cup bras »


Amazon A cup bras »


Amazon B cup bras »


Amazon C cup bras »


Video Top 10 for petite ladies by Herroom

How To Measure Your Bra Size
Bras For Women With Small Cup Sizes
Bras For Strapless And Backless Dresses
Best Bra Styles For Deflated And Pendulous Breasts
Best Bras For The Plus Size Petite Woman
Cleavage Defined: The Hidden Truth