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A simple rule to follow when you need to change your bra size

Changing your bra size

 

Sizing for bras is always going to be tricky as they need to be sized to fit around a ladies chest as well as accommodating different sized breasts.  This “two way” sizing requirement means a simple system like dress sizing could never work.

However, the way that bras are sized is really unusual – one of the most confusing sizing systems I have ever come across.  I am pretty sure that this is the main reason that most women are in the wrong sized bra.  I did a sample in my shop last week and EVERY SINGLE CUSTOMER was in the wrong size – 100% – quite amazing really.

It is particularly confusing if you have been wearing the same size bra for a while – but decide for some reason (such as losing or gaining weight) that you need to change your size.

The main thing to understand is that the Cup size is NOT the physical size of your breast – it measures the size of your breast relative to your chest size.  So, for example, the physical size of a D cup changes depending on the band size of the bra you are looking at.

 

Simple rules for when you need a change of bra size

 

The simple rules are:

If you go UP a back size, the physical size of a cup increases

– so a 36D has a cup which is one size larger than a 34D (so the 36D has the same size cup as a 34DD)

– all of these bras have the same physical cup size 30F – 32E – 34DD – 36D – 38C – 40B – 42A

Similarly,

If you go down a back size the physical size of the cup decreases

– so a 34D has a cup which is one size smaller than a 36D (so the 34D has the same size cup as a 36C)

– all of these bras have the same physical cup size: 40A – 38B – 36C – 34D – 32DD – 30E – 28F

 

So what does this mean if I need to change my bra size ?

 

This means that if you are a 36D, and you put on a bit of weight – check separately how the back fits and how the cup fits.  You might find that your bras become a bit tight on the back AND in the cup.  To get a bra that is one size larger in the cup AND one size larger in the back you would need to buy a 38D.

I think many women would go for a 38DD (one number bigger and one letter bigger) and this would result in a bra that was ok on the back but would not support the breast properly.

 

Practical examples of changing your bra size

 

So here are some practical examples based on the situation where your current bra is a 36D.

If you need a larger bra:

1.  if you need the same back size with a larger cup – go for a 36DD

2.  if you need a larger back with the same cup – go for a 38C

3.  if you need a larger back and a larger cup – go for a 38D

If you need a smaller bra:

1.  if you need the same back size with a smaller cup – go for a 36C

2.  if you need a smaller back with the same cup – go for a 34DD

3.  if you need a smaller back and a smaller cup – go for a 34D

 

I know it is rather confusing – but read it again and it will all make sense.

I hope that helps !!

Geraldine

 

  1. I have been visiting Geraldine at Betty and Belle for 5 years and have changed bras more than once in that time. To be absolutely sure you are wearing the correct size and therefore be the most comfortable and confident is to be professionally measured. So get yourself sorted NOW!!

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