👙 Bra Size Calculator
Calculate your bra size from band and bust measurements in inches, plus sister sizes for a better fit.
How to Measure for Bra Size
Band size: Measure snugly around your ribcage, just under the bust. Round to the nearest even number. Bust size: Measure around the fullest part of the bust while wearing an unpadded bra. The cup size is determined by the difference between bust and band measurements.
What Are Sister Sizes?
Sister sizes have the same cup volume but different band sizes. For example, 34C, 36B, and 32D all have the same cup volume. If your band feels too tight, try the sister size one band up (with one cup size smaller). If too loose, go one band down (with one cup size larger).
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