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What is the difference between going down or up a band size when looking for a new bra? - Quora

When measuring a bra band size, why add 3-4 inches to the under bust measurements for the band size? - Quora

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Boob Or Bust - Bra Advice - If you've done the backwards band test and the bra fails the test, you'll need to sister size for that bra. As cup sizes aren't

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Why do different regions have different standards for bra sizes? - Quora