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How To Measure Yourself For a New Bra

Anyone who’s found The One knows that a good bra is essential to feeling and looking great. It can improve posture, reduce back pain, make your clothing look better, and at the very least, make you feel more confident. 

It’s all too easy to wear the wrong bra size, so if you find yourself squirming inside your cups, tugging at the band of your bra, and looking forward to the moment you can discard it after a long day, read on. We’ll help you find your perfect fit. Before you start:

  • Have a friend (or your man) to help you with the measurements.
  • When taking measurements, be sure to stand up straight and exhale fully.
  • Note: Inches do not equal size, meaning 34 inches does not equal a size 34 band (Ugh, confusing, I know, but we didn’t make the rules). 

Step 1: Bra Band

Take off your top and wear an unlined, non-padded bra. Now run the measuring tape all the way around your back where your band sits, being careful to keep the tape level. It should be as snug as possible without digging. If you don’t get a whole number, round to the nearest whole number, and then use the chart below to find your band size.

Step 2: Cup Size

Run the measuring tape around your back, just under your shoulder blades, and up around the fullest part of your bust. The tape should just skim the bra in front.

Now, subtract the difference

subtract your band size from your bust measurement. The difference in inches corresponds to your cup size below.

If you have purchased a bra (either from us, or elsewhere) and the size isn’t quite right, it’s easy to work out what’s gone wrong and how to find the right size for you. 

SIZING GUIDELINES

DIFFERENCE  CUP SIZE
1″ A
2″ B
3″ C
4″ D
5″ DD or E
6″ DDD or F
7″ G

Expert Tip

Bra cups are ‘cross graded’ which means the same cup is used for several different ‘sister’ sizes. If your band is too tight, but the cup fits perfectly, then you need to go up a band size and down a cup size (this will make the band 2″ longer, but the cup the same as the first size).

SISTER SIZES

For example, the sizes 30D, 32C, 34B and 36A all have the same cup volume and use the same underwire. The difference between those sizes is the band.

WIRE BRA SIZE
28 30A
30 30B 32A
32 30C 32B 34A
34 30D 32C 34B 36A
36 30DD 32D 34C 36B 38A
38 30DDD 32DD 34D 36C 38B 40A
40 30G 32DDD 34DD 36D 38C 40B 42A
42 30H 32G 34DDD 36DD 38D 40C 42B 44A
44 30I 32H 34G 36DDD 38DD 40D 42C 44B 46A
46 30J 32I 34H 36G 38DDD 40DD 42D 44C 46B
48 32J 34I 36H 38G 40DDD 42DD 44D 46C
50 34J 36I 38H 40G 42DDD 44DD 46D
52 36J 38I 40H 42G 44DDD 46DD
54 38J 40I 42H 44G 46DDD
56 40J 42I 44H 46G

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