Bra Size Calculator

Your details

Measure snugly around your ribcage directly under your breasts, keeping the tape horizontal. Breathe out normally while measuring.
in
Measure loosely around the fullest part of your bust, keeping the tape parallel to the floor. Wear an unpadded bra or no bra.
in
Modern sizing rounds your underbust directly to the nearest even number. The traditional method adds 4 or 5 inches, which was designed for older less-stretchy fabrics. Most current bra brands use the modern method.
US/Canada sizeFull D
32DD

Your bra size in US/Canada sizing

UK/Australia/NZ size32DD
EU/Continental size80A
Band size32
US cup letterDD
Bust-underbust difference5in
Sister size (smaller band)30DDD/F
Sister size (larger band)34D
Band size (inches)32
Cup difference (inches)5

Your bra size is 32DD (US) / 32DD (UK) / 80A (EU).

  • Your US bra size is 32DD. This means a band of 32" and a DD cup, based on a 5.0" bust-to-underbust difference.
  • Your sister sizes are 30DDD/F (smaller band, bigger cup) and 34D (larger band, smaller cup). All three hold the same cup volume and can be interchanged if one band fits better.
  • Cup size is always relative to band size. A 36B holds more volume than a 32B, even though both are labeled B cups.

Next stepIf a bra in your calculated size feels off, try the sister sizes or a professional fitting at a lingerie store, since brand sizing varies.

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