What are the sister sizes of 38A?

36B — same cup volume, different band.

Is 38A the same in every brand?

No. A 38A 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.

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

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

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

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 38A

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

36B

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

Check my size →

Brands that make A-cup bras

38A FAQ

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