Tips & Warnings

Tips

• This measurement applies to the UK, but it can be translated into bra sizes for other countries using an international bra size converter.
• Cup sizes above D tend to vary significantly between manufacturers. Some brands go to the next letter of the alphabet for each cup size, while others include double letters or miss out certain letters altogether. However, all cup sizes have the same increments - whether the next size up from F is FF or G makes no difference to the size of the bra. Double letters are not half sizes.
• A well-fitted bra should provide support from the band, not the straps. You should be able to take off the straps and still feel supported by the bra.
• Always try on a bra before you buy, and keep an open mind about your size.
• It is possible to find out your bra size without a tape measure. If you already wear a bra which seems to fit well in the cup, but is roomy around the band, you can go down a band size and up a cup size until you get to a size you can only just fasten - this is the right size. (e.g. 36C -> 34D -> 32DD)
• If you have uneven cup sizes, go with the bigger side. You can support the smaller breast by making that shoulder strap slightly shorter, or alternatively you can pad out the cup.

Warnings

• As mentioned above, this is only to give you an approximate idea of what size to try on first. Women come in all shapes and sizes, and bra size can be affected by back proportions, distribution of body fat, and so on. All of these factors can interact to affect your bra size in ways that are impossible to predict.
• Ignore anyone who claims to be able to tell you your size with certainty from your measurements - especially if they tell you to add several inches to your underbust measurement. Just like dress sizes, bra sizing has changed over the years, and the old method does not work for modern bras.
• If you have previously been told your size, but now find that a different size fits better, just wear the size that fits! The fit is more important than the number on the tape measure.
• Don't be tempted to buy the wrong size or a poorer quality bra because it's cheaper. With bras you generally get what you pay for. It's better to have one bra that fits really well, than three that are uncomfortable!