What are the sister sizes of 30DDD?

28G and 32DD — same cup volume, different band.

Is 30DDD the same in every brand?

No. A 30DDD can fit differently between brands because of pattern, fabric and cup shape. Use it as a starting point and try a sister size when switching brands.

30DDD bra size — conversion chart, sister sizes & brands

A 30DDD bra (US notation) in every regional standard. The same band-and-cup, labelled eight different ways.

US	UK	EU	FR	IT	AU	JP	IN
30DDD	30E	65F	80F	65F	8E	65F	30E

Band conversions are exact; cup fit still varies by brand, style, and body — a conversion is a starting point, not a guarantee.

Sister sizes of 30DDD

Sister sizes hold the same cup volume with a different band — the quickest fix when a band feels too tight or too loose.

28G 32DD

Not sure you're a 30DDD? Two measurements, two minutes — free, nothing stored.

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Brands that make DDD-cup bras

30DDD FAQ

What is 30DDD in EU sizing?: 30DDD (US) is EU 65F. In UK sizing it is 30E. Band conversions are exact; cup fit still varies by brand, style, and body — a conversion is a starting point, not a guarantee.
What are the sister sizes of 30DDD?: 28G and 32DD — same cup volume, different band.
Is 30DDD the same in every brand?: No. A 30DDD can fit differently between brands because of pattern, fabric and cup shape. Use it as a starting point and try a sister size when switching brands.