Interactive bra size chart
How bra sizes work
t’s important to understand that the band size and the cup size work together. One of the most common misconceptions is that a D cup is always bigger than a C or B cup. In fact, a bra’s cup size is dependent on its band size – so a 32D holds the same volume as a 34C but is actually smaller than a 38B.
What does this mean in practice? Well, if, for example, you are currently wearing a 36DD and you want to go down a band size but keep the same cup, you will need a 34E, not a 34DD, to accommodate your breasts.
If, on the other hand, you are wearing the correct band size but wish to try a different a cup size, all you need to do to is move up or down a letter size. (This is why it is a good idea to establish your correct band size first before moving on to the cups.)
Bearing this in mind, be prepared for your true size to surprise you. Even if you think of yourself as ‘busty’, this does not always translate to a bigger band size – the volume of your breast is all in the cup size. So, for example, people often think that Katie Price’s size is somewhere in the region of a 36DD because 36 is thought to be a large bra size; in fact, she is a 30G. This is almost the same cup size but a smaller band size.
Elizabeth, like many women, was wearing a bra that was too big in the band and too small in the cup. She arrived at our fitting studio in a 36C bra which was riding up at the back and offered little support, causing her to hunch forward.
After being fitted, she emerged a taller, more confident 32E. In the correct bra not only are her breasts properly supported, but her torso looks longer and her posture is better – you can really see the difference it makes under her everyday clothes.
Interactive bra sizing calculator
If you have worked through our fitting clues, you should now have a fair idea of whether you need to try a different size of cup or underband – or even both.
Our interactive bra sizing calculator will help you work out which size is the best fit for you.
Simply select your current size from the drop down list below and click on the up and down arrows depending on whether you need to increase or decrease your cup or band size.