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How to Measure Your Bra Size: Step by Step from The Bra Doctor

 


 

A woman can go through as much as six different size changes throughout her life.  These changes are due to fluctuations in pregnancy, weight, use of birth control pills and menopause.  This is probably why an estimated 80% of women wear the wrong bra size. 

To find the perfect bra it is important to know your size or approximate size and to estimate what style bra is most convenient for you.  It is equally important to consider that sizing standards from one manufacturer is not the same standard as another, that European sizes are smaller than American and Canadian sizes, that breast shapes vary from one person to another. Given these facts go directly to Step One.

How to find your size

1. Your band size represents your diaphragm or your body. The number 30, 32, 34 and so on is know as the underbust measurement because it is taken from underneath your bust and around your rib cage.
2. Your cup size is the letter which represents the depth of your bust. The vowel A,B,C and so on, known as the overbust measurement is taken around the fullest part of the bust.

Step One

Band Size With your bra on use a standard dressmaker's tape measure and measure snugly around your rib cage, under your bust and shoulder blades. Add 5  to that number.  Once you add the 5, if the number is even then that is your Band Size. If the number is odd round up to one.  If, let's say, it's 31 then add 1 to make it even and it becomes 32.

Ribcage Add 5" Imperial Size Metric
27" 5' 32' 70 cm
29" 5" 34" 75 cm
31" 5" 36" 80 cm
33" 5" 38" 85 cm
35" 5" 40" 90 cm
37" 5" 42" 95 cm
39" 5" 44" 100 cm

Step Two

Cup Still using the same tape measure with a bra on and your clothes off place the tape measure under your arms and over the fullest part of your bust.


Last Step  Subtract the number obtained from Step 1 (rib cage measurement) from number from Step 2.  For example if your number in Step 1 is 38 overbust - 34 underbust measurement = 4" then 4" = D cup

Cup Size
Difference 0"-1/2" 1/2"-1 1"-2 1/2" 2 1/2"- 3 1/2" 3 1/2" - 4 1/2 4 1/2 - 6" 6" 7" 8" 9" 10"
Cup Size AA A B C D DD & E DDD,E & F G H I J

For more questions, contact the  BRA DOCTOR.

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