Things You'll Need:
- Tailor's tape measure
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Step 1
Wrap the tailor's tape measure high around the back and under the arms. Hold it snugly, but not too tight. The inch number is your band size.
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Step 2
Add one inch if your band size is an odd number. For example, if your band size is 35" add 1". Your band size is 36".
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Step 3
Place the tailor's tape measure comfortably around the fullest part of your bust.
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Step 4
Subtract your band size from your cup measurement. This new number determines the letter of your cup size. For example: 39" minus 36". Your cup size equals 3, a "C" cup.
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Step 5
Use this handy reference: 1" difference is an "A" cup, 2" difference is a "B" cup, 3" difference is a "C" cup, 4" difference is a "D" cup, 5" difference is a "DD" cup, 6" difference is a "DDD" cup, and so on.

















Comments
Zoggi said
on 12/11/2008 This is slightly better than the usual method of taking the underbust measurement and adding 4 or 5 inches, but it still gives me the wrong size. It tells me I should be in a 32C, but I actually wear a 30E! The band of the bra does not go around the top of your chest, so why measure there?!? Just take your underbust measurement (where the bra band goes!) and round it to the nearest even number.