women adjusting her bra

Bra band size too small

You probably know the feeling of a bra band feeling too tight. However, most support from a bra comes from its band. So a firm band is what you should look for, but surely not too tight.

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How do I know if my bra band is too small?

A bra band is surely too small if you feel your band the whole day.

Are you feeling a big relief when taking your bra off in the evening? This is not a good sign.


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

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This is what a bra band should feel like:

  • the bra band should give you a firm support
  • it’s okay to feel the bra band being a bit tight when wearing it for the first 20 minutes
  • the elastic fiber will adjust to the warmth of your body and relaxes a bit
measuring tape for bra
A little difference in measurements could change your bra band size

Read our guide How to measure your bra size »


Do bra bands stretch out?

Bra bands do stretch out. It’s what the elastane in your bra does. It is made to be stretchy and therefore does the job for your underbust and breasts.

  • wear your new bra on the first hook (leave the other hooks for later)
  • you’ll notice in time the bra becomes less and less stretchy.
  • use the second and third hook to still have enough support coming from the fabric.

Did you know that regular washing and a day’s rest are good things for your bras? Read more ‘How to wash & take good care of your lingerie’»

Using a bra extender can be a good solution for the bra you bought and is still too small after all. Or you might have gained some weight and use extenders so you can still wear your bras (that is if your cup size is still alright).

H&S 12 x Bra Strap Extenders Extensions Elastic Extender Set 2 and 3 Hook | See details at Amazon.co.uk



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A change in band size will automatically change the cup size

woman holding measuring tape wearing a yellow bra top
Going up or down a band size will change the size of your cups

Did you know a change in your band size has a direct effect on your cup size? Going down or up a band size will automatically change your cup volume.

What you should realize is the fact that going up a band size will change your cup volume as well. For example, a bra 32C has a different cup volume than a bra 30C.

Let me explain this with a few examples.


Going up a band size and keeping the same cup volume

  • I wear 90D and I need a bigger bra band – I want the same cup size.
  • Try 95C.

By going up a band size the cup size will automatically be larger. So you would have to go down a cup


Going up a band size and needing a different cup size as well

  • I wear 90D and I need a wider bra band – and a smaller cup size
  • Try 95C or 95B. By going up a band size the cup size will automatically be larger.
  • I wear 90D and I need a wider bra band – and a larger cup size
  • Try 95D or maybe 95DD.

Knowing your sizes will make you understand what bra size to try. It can well be you’re in between two sizes and you could try (and fit!) different sizes. Read more about Bra sister sizes | do I have one?


Other articles you might like

Why and how to measure my bra sizes at home?


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 | US | CA | IE | ES | FR | AU
select your shop/country

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