What are the sister sizes of 30DD?

28DDD and 32D — same cup volume, different band.

Is 30DD the same in every brand?

No. A 30DD 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.

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

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

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

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 30DD

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

28DDD 32D

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

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Brands that make DD-cup bras

30DD FAQ

What is 30DD in EU sizing?: 30DD (US) is EU 65E. In UK sizing it is 30DD. 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 30DD?: 28DDD and 32D — same cup volume, different band.
Is 30DD the same in every brand?: No. A 30DD 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.