As an Amazon Associate, I earn from qualifying purchases, see my full disclosure 

This guide is for all women and girls with AAA, AA, A or B cup sizes. Do you know yours?

woman wearing small cup bra

Small cups can be very close, and you might fit more than one bra size. See Guide


Bra Size Guide for AAA-C cups


1. How to measure a small cup?

adult woman wearing a pink small bra


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.


Her Room Banner

See my bra calculator or shop for bras at:

Lulalu Bras | Women's AAA-A cups »

HerRoom | Training and teen bras »

ThirdLove | Asymmetric Breasts »


Lulalu bras for women with AAA, AA, A cups | bands 30-42 | See Lulalu.com


Bra sizes can be very close! Read more about measuring smaller breasts


2. A cup vs B cup

3 different bra sister sizes


An A cup and a B cup can have the same cup volume. How come?

Well.

You cannot judge a bra size only by its cup size.

To compare different cup sizes you would have to know the band sizes too. Read more on A cup vs B cup


3. Small bra size chart

measuring tape for bra

Bra sizes can be very close. Really close.

Maybe you wear an A or B cup, but really need an AA or even a C cup at this moment. Only a slight change in your measurements could mean a different bra size than you are used to right now.

Do not skip this small bra size chart if you’re petite.


4. What are bra sister sizes?

woman holding measure bra tape


Bra sister sizes are bras that have different numbers but do have the same cup volume.

Decide over time what your preferences are. It can well be that you wear different bra sizes that all fit you just fine.

Depending on the bra style and the bra brand you might want to choose different bra sizes sometimes. Find out your bra sister size


5. How to measure your bra band

woman looking in the mirror at her bra band


The most support of our bra comes from its band, so it should be a bit firm but never too tight.

What if you measure in between two possible band sizes? Read more on choosing your best bra band


6. The average bra size US


Boobs in the US apparently have grown over the years. Weight gain and breast implants played a role in the increase over the years.

What’s the average cup size and what’s a normal size?


7. The best bras for sagging breasts

woman in a sportsbra doing yoga

What bra styles are best for deflated and pendulous breasts? And what bras you’d better avoid? See best bras for sagging breasts


8. Why wash your bra by hand?

woman washing bra by hand

Your bra is a delicate treasure.

The elastic fiber regains its shape after regular hand washes. Learn more about how to wash and dry your bras


My other guides

6 reasons why small boobs deserve a fine bra
Bra calculator
Cup AAA guide
Cup AA guide (also teens)
Cup A guide
Mastectomy bras
Bra Accessories
Blogs on bras and more


Is there a question about your bra still unanswered? Please let me know. I’ll be happy to advise.


Lulalu Bras for women with AAA, AA, A cups | bands 30-42 | See Lulalu.com



Her Room Banner

See my bra calculator or shop for bras at:

Lulalu Bras | Women's AAA-A cups »

HerRoom | Training and teen bras »

ThirdLove | Asymmetric Breasts »