What are the sister sizes of 40H?

38I and 42G — same cup volume, different band.

Is 40H the same in every brand?

No. A 40H 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.

40H bra size — conversion chart, sister sizes & brands

A 40H bra (US notation) in every regional standard. The same band-and-cup, labelled eight different ways.

US	UK	EU	FR	IT	AU	JP	IN
40H	40FF	90H	105H	90H	18FF	90H	40FF

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 40H

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

38I 42G

Not sure you're a 40H? Two measurements, two minutes — free, nothing stored.

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Brands that make H-cup bras

ThirdLove Savage X Fenty Wacoal Panache Freya Chantelle CUUP Hunkemoller Marks & Spencer Cosabella Elomi Empreinte Prima Donna Curvy Kate Berlei Lane Bryant / Cacique Torrid Parfait Boux Avenue Pour Moi

40H FAQ

What is 40H in EU sizing?: 40H (US) is EU 90H. In UK sizing it is 40FF. 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 40H?: 38I and 42G — same cup volume, different band.
Is 40H the same in every brand?: No. A 40H 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.