How do bra measurements and sizes work? This makes no sense to me

Bra Fit Guide: Find Your Perfect Bra

How to Measure Your Bra Size: Chart and Calculator

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How do bra measurements and sizes work? This makes no sense to me. - Quora

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Bra Fit Guide & Bra Size Chart — Measure Your Bra Size —

Finally, Bra Sizes Explained – Understanding How Bra And Cup Sizes

How do bra measurements and sizes work? This makes no sense to me