What is my best bra size?

Every woman or girl has her own unique proportions. That’s why there are over 100 different bra sizes available. Here’s my quick guide on finding yours.

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What does a bra size consist of?

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As I mentioned there are lots of different bra sizes, over a hundred!

Band sizes start from 60 centimeters or sometimes 65 centimeters, depending on the brand. Band sizes can go up to 130 centimeters.


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The smallest bra cup size is AAA.

There are many bigger cup sizes and go up to cup O.

A bra size (for example, 70A), always consists of a number. That’s your band size. The letter stands for your cup size.

Important! Are you going up or down a band size? In this case, the cup volume will also change.

  • 70A and 75B bras do not have the same cup volume
  • 70A and 65B do have the same cup volume

So, if you only want to change your band size? Always go up or down a cup size as well.


Which bra size is normal?

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Every bra size is as normal as any size of breasts is.



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Cup AA can be a first bra for a young girl. It can also be the cup size for a grown-up woman. We come in all shapes and sizes. It’s what’s nature is all about.


How will I know my bra size?

woman holding measuring tape to measure her bra size

Often I get the question ‘why do I have to know my measurements that precise?’

What does a little change in measurement do? Does it have to be that precise?

Yes. 

This is because only a slight change in measurement could mean a whole different bra size you might need!

Maybe your measurements fit nicely in a certain band and cup size. But many of us are in between two sizes. That’s two possible sizes.

Think of reasons why our body proportions (and breasts) may change. For example, because of losing or gaining weight. Measuring regularly is not a luxury.


Do I have to measure myself?

You don’t have to of course. Maybe you like a fitting in a lingerie store.

measuring bra size in a lingerie store


It doesn’t take much time to measure yourself. Knowing your size makes shopping for a bra easier.

Bra brands can have differences in their fit. Knowing your alternative sizes (sister sizes) will make shopping more fun.


What if I’m in between two bra sizes?

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If you can choose between two band sizes, you choose the one you find most comfortable. Do realize a bra band should be quite firm. the most support from a bra comes from its band.

For example, you measure 77 centimeters. If you look at a bra size chart you could either go for 75 band or 80 band.

  • you choose 75B. You find the band is too tight and choose 80B instead. The cup volume of these bras is not the same.
  • in other to keep the same cup volume you need to choose 80A


Other articles you might like

Measuring guide on all topics
Buying my first bra | girl’s guide
Why it’s best to handwash your bras
How to choose a comfortable bra band size?
About the average bra size UK
How to use UK bra size chart
Why is my bra hurting me?


Check your size in my bra calculator
of visit M&S for advise and size chart

measure tape bra size uk

Marks & Spencer | Find your Perfect Fit
UK | CA | IE | ES | FR | AU
select your shop/country

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