Things You'll Need:
- Bra Measuring tape
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Step 1
Put on a bra that is comfortable. Remove your outer clothing.
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Step 2
Use a measuring tape to take the measurements of your ribcage, right under the breasts, and take note of this measurement. This is for the band size of your bra.
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Step 3
Use the measuring tape to measure across the fullest part of your breast. Take note of this measurement and this is for your cup size.
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Step 4
Add 4 inches to the under bust measurement, if the measurement is an even number, and 5 inches if the measurement is an odd number. This is the band size of your bra. For example if the measurement you take is 32 inches you will add 4 inches for a total of 36 inches; if the measurement is 33 inches, you will add 5 inches for a band size of 38 inches.
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Step 5
Subtract the band size from the cup measurement to determine your correct cup size. For example, if the measurement at the fullest part of your breast is 40 inches and your band size is 36 inches, then the difference is 4 inches. Cup sizes are measured as A, B, C, D, DD/E, etc. 1 inch is the same as one letter. Therefore 4 inches would be D and the bra size in this case would be a 36D.
