The smallest bra size online

woman in pink bra small cup

You won’t find the smallest bra cups in the lingerie shop near your place. That’s oke because we’re experienced online shoppers nowadays, aren’t we? Still, not that many brands carry AAA and AA cup bras. So here’s my little guide on the smallest cup sizes.

Please note that this article contains affiliate links. Please see my full disclosure at the bottom of the page.

Can bra sizes be that close?

Yes, yes and yes.

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 very close.

Use my bra calculator to play around with your measurements a bit. It will be of great help to learn what bra sizes you can try.

What about men’s bras? Please see my article on how to measure a men’s bra and look at 10 different bras for men

bra dobreva collection small cup

DOBREVA Women’s Front Closure T-Shirt Push Up Adds 1 Cup Size AA – DD cup | See collection Dobreva at

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. Read all about finding your (first) bra in this article on teen bras for AA-C cups

Why many petites wear a wrong bra size?

woman in a small bra size
  • in the shops, we cannot try the smallest sizes because they don’t sell them ☹️
  • we often get the wrong advice after 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 if you’re small, and then likely just will choose a cup size that is closest to your measurements
  • it is very normal to stick to something that is not good for you, like a bad-fitted bra
  • we do not take some 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 here (when having an AA or AAA cup you indeed do not).

Exclusive AAA, AA & A cups | Shop

Knowing your sizes will change you into a bra-lover

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

I encourage every woman to learn about her own sizes. Even if you have a bra fitting I always advise you to write down your own measurements. It will make it easier to check your size in a size chart (or calculator) and see what your options are.

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.

80% of women are wearing the wrong size bra
Find your fit Thirdlove's Fit Finder Quiz

A bra in 34AA and 36AA does not have the same cup volume. However, bras 34AA and 32A do have the same cup volume.

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. Lingeriecompany 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.

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. Even though many people may think it is. Other small cup sizes are AAA and AA.

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.

See all about it my AAA bra guide

2. AA cup

Dobreva bras AA-DD cups | See the collection Dobreva at

In my AA cup guide you’ll find several topics just for AA-sized ladies. Like bras for grown-up women and where to find the best AA bras and bikini’s. Have a look at topic 1 and 3 if you’re looking for a teen bra.

See all about it in my AA bra guide

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

3. A cup

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

Remember that bras have sister sizes. Meaning you could well fit more than one bra size. Especially 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.

What brands to shop if you’re an A? See all about it in my A bra guide

Other articles you might like

A cup vs B cup what’s the difference?
Best bra styles for sagging breasts
Discover the push-up Wonderbra
The best bikini tops for small cups
My personal favorite 34aa bras
Where to shop your AA cup size?
Small cup bras with a large band 40-58

Herroom Video Top 6 for Petite Ladies

  1. How To Measure Your Bra Size »
  2. Bras For Women With Small Cup Sizes »
  3. Bras For Strapless And Backless Dresses »
  4. Best Bra Styles For Deflated And Pendulous Breasts »
  5. Best Bras For The Plus Size Petite Woman »
  6. Cleavage Defined: The Hidden Truth »