What are the sister sizes of 34D?

32DD and 36C — same cup volume, different band.

Is 34D the same in every brand?

No. A 34D 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.

34D bra size — conversion chart, sister sizes & brands

A 34D bra (US notation) in every regional standard. The same band-and-cup, labelled eight different ways.

US	UK	EU	FR	IT	AU	JP	IN
34D	34D	75D	90D	75D	12D	75D	34D

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 34D

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

32DD 36C

Not sure you're a 34D? Two measurements, two minutes — free, nothing stored.

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Brands that make D-cup bras

34D FAQ

What is 34D in EU sizing?: 34D (US) is EU 75D. In UK sizing it is 34D. 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 34D?: 32DD and 36C — same cup volume, different band.
Is 34D the same in every brand?: No. A 34D 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.