What are the sister sizes of 38C?

36D and 40B — same cup volume, different band.

Is 38C the same in every brand?

No. A 38C 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.

38C bra size — conversion chart, sister sizes & brands

A 38C bra (US notation) in every regional standard. The same band-and-cup, labelled eight different ways.

US	UK	EU	FR	IT	AU	JP	IN
38C	38C	85C	100C	85C	16C	85C	38C

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 38C

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

36D 40B

Not sure you're a 38C? Two measurements, two minutes — free, nothing stored.

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Brands that make C-cup bras

38C FAQ

What is 38C in EU sizing?: 38C (US) is EU 85C. In UK sizing it is 38C. 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 38C?: 36D and 40B — same cup volume, different band.
Is 38C the same in every brand?: No. A 38C 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.