D vs DD Cup
One inch of difference: D is four inches over the band, DD is five. Same notation in US and UK; the EU writes DD as E.
Same inches, three names
| Bust − band | US | UK | EU |
|---|---|---|---|
| 3″ | C | C | C |
| 4″ | D | D | D |
| 5″ | DD | DD | E |
| 6″ | DDD | E | F |
| 7″ | G | F | G |
| 8″ | H | FF | H |
| 9″ | I | G | I |
Read the system, not the letter. Above D, US repeats D (DD, DDD), the UK doubles alternate letters (DD, E, F, FF, G, GG), the EU just continues (E, F, G). Convert exactly with the size converter.
D vs DD: answered
Is a D cup the same as a DD cup?
One inch of difference: D is four inches over the band, DD is five. Same notation in US and UK; the EU writes DD as E.
Which is bigger, D or DD?
Depends on the system: One inch of difference: D is four inches over the band, DD is five. Same notation in US and UK; the EU writes DD as E.
Why do cup letters differ between countries?
US, UK and EU sizing all measure the same inch difference but continue the alphabet differently above D.
Opens HauteFlair’s own hub page; use your measured size there. HauteFlair is owned by the same company as Brasize.ai; that relationship never changes the sizing math, charts, or fit advice on this page. How this site makes money.
Find your cup, in every system
Two measurements, then the letter in US, UK and EU.
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