What are the sister sizes of 30D?

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

Is 30D the same in every brand?

No. A 30D 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.

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

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

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

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 30D

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

28DD 32C

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

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Brands that make D-cup bras

30D FAQ

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