measure bra size

The Smallest Bra Size Online

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Are you a woman or a girl with smaller breasts? It could be you need an AAA, AA, or A cup. But it might as well be a bigger cup. Learn more about the smallest cup sizes

woman in aaa cup bra smallest bra size online

Callie Wireless Lace Bra | AAA, AA & A cup | See

Her Room Banner

See my bra calculator or shop for bras at:

Herroom D+ 30% off Sale Comfort Bras
Lulalu Small Bras AAA, AA and A
Amazon Best Sellers in Everyday Bras
60+ sizes & half cups ThirdLove

The 3 smallest bra sizes online

A well-fitted will turn any woman into a bra lover

Let me just say ‘there’s no such thing as boobs being too small’.

Women are unique and so are their breasts. That’s why breasts come in all kinds of sizes and shapes. Lingerie company Thirdlove talks about 9 boob types

Please know that there is a bra size for every petite woman. There is no need to feel left out. Times have changed for the better.

AAA, AA, A cups | Shop at

If you are a petite-breasted woman you can shop too! Thank god some ladies started designing small bras out of their own needs and the needs of women around them.

It may seem that boobs only get bigger and bigger. But there are, and always will be, LOTS of women with smaller breasts. I personally believe we could fill up a new planet with us petite. It is my mission for every small-breasted woman to become a bra LOVER.

Bra cup A is not the smallest cup size that you can buy. Other small cup sizes are AAA and AA.

Can bra sizes be that close?

DOBREVA Strapless Padded Push-up Bras AA-DD | See

I meet a lot of women who wear A and B cups but really need a smaller cup size like AA or AAA. But it could also be they need a B cup instead of the A cup they are wearing (or even a C).


Bra sizes can be that close.

A small cup size, like an AA, can fit a teenage girl, but it can also be the right cup size for a grown-up woman.

Why do we (keep) wearing the wrong bra size?

DOBREVA Front-Closure T-Shirt Push Up AA – DD cup | See

I’ve listed some reasons why the smallest cups are overlooked.

  • in the shops, we cannot try the smallest sizes because they don’t sell them ☹️
  • we often get the wrong advice after a fitting
  • how can anyone advise you if they do not stock your size and are not aware of the existence of the smallest sizes?
  • 99% of bra size charts do not list the smallest cup sizes
  • you cannot possibly check your sizes correctly in the standard bra size chart if you’re small
  • it is very normal to stick to something that is not good for you, like a bad-fitted bra
  • we do not take the time to measure our sizes and check them in the right bra size chart
  • our body has changed and maybe our breasts as well, but we keep on wearing the bra size we’ve always been wearing

It’s very common for small-breasted women not to have had the right bra size ever before! If you’re small you tend to avoid the lingerie stores, feeling you don’t belong there (when having an AA or AAA cup you indeed do not).

Knowing your sizes

Hanes Women’s Convertible Seamless Wire-Free Bra Small – X-Large | See

I encourage every woman to learn about her own size. Even if you’re having a bra fitting, my advice is to write down the measurements.

You may have more than one bra size that might fit you just fine.

I have 3 different bra sizes and they all fit me fine. I usually have 34AA, but I’m close to the band size 36. In this case, I go for 36AAA. Because when going up or down a band size the cup volume of the bra will change too. 34A might work for me too, depending on the style and brand.

1. AAA cup

From the Lulalu collection | Exclusive AAA-A cups

Lulalu and Little Women are two lovely lingerie brands that have AAA cups in their collection.

Although this may seem a little for all those women wearing AAA cups. But you do not need to worry. Their collections are just… wonderful, from basic, lacy & more sexy styles.

2. AA cup

Dobreva bras AA-DD cups | See

Are you an AA? Here’s the list of my personal 9 favorite 34aa bras

3. A cup

Over 3500 ratings! Warner’s Cloud 9 Wire-Free Contour Bra A-D cup | See

Remember that bras have sister sizes. If you’re in between two possible band sizes you could well have different cup sizes that fit you just fine. For example, a bra 80A has the same cup volume as a bra 75B.

Other articles you might like

A cup guide on all topics
The average cup size US
Bras for men
The best bikini tops for small cups
Swim shapers
Bra alternatives for a braless day
8 Soft silk bras
Bras for women with 28a
Small cup bras with a large band 40-58

AAA, AA, A cups | Shop at

Her Room Banner

See my bra calculator or shop for bras at:

Herroom D+ 30% off Sale Comfort Bras
Lulalu Small Bras AAA, AA and A
Amazon Best Sellers in Everyday Bras
60+ sizes & half cups ThirdLove