What are the sister sizes of 44B?

42C — same cup volume, different band.

Is 44B the same in every brand?

No. A 44B 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.

44B bra size — conversion chart, sister sizes & brands

A 44B bra (US notation) in every regional standard. The same band-and-cup, labelled eight different ways.

US	UK	EU	FR	IT	AU	JP	IN
44B	44B	100B	115B	100B	22B	100B	44B

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 44B

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

42C

Not sure you're a 44B? Two measurements, two minutes — free, nothing stored.

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Brands that make B-cup bras

44B FAQ

What is 44B in EU sizing?: 44B (US) is EU 100B. In UK sizing it is 44B. 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 44B?: 42C — same cup volume, different band.
Is 44B the same in every brand?: No. A 44B 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.