An E cup means different things depending on the label. In UK and Australian sizing, E is the cup after DD: about 6 inches between band and bust, the same as a US DDD. In EU and French sizing, E is one cup smaller, about 5 inches, which equals a US DD. Some US brands also print “DD/E” on their DD bras.
| Band 34 | Underbust over 32 and up to 34 inches (81–86 cm). We round your underbust up to the next even number. |
|---|---|
| Cup E | Bust about 6 inches bigger than the band: roughly 39½ to 40½ inches (100–103 cm) around the fullest part. |
| Sister sizes | 32G (UK 32F) (tighter band) and 36DD (looser band). Full diagonal: 28I (UK 28G), 30H (UK 30FF), 32G (UK 32F), 34DDD (UK 34E), 36DD, 38D, 40C, 42B, 44A, 46AA. |
| Same size abroad | US 34DDD · UK 34E · EU 75F · French 90F · Australia / NZ 12E |
Brands measure differently, and some US brands add inches to the band. Use these numbers as a starting point, then check the fit. Calculate your own size · See every sister size · Convert another size
E cup in every system
| Label on the bra | Cup difference | US equivalent | UK equivalent |
|---|---|---|---|
| UK or AU E | 6 in | DDD | E |
| EU or French E | 5 in | DD | DD |
| US “DD/E” | 5 in | DD | DD |
Brands that use UK sizing, such as Curvy Kate, list both labels on their US sites (for example, a UK 34E shown as US 34DDD). Our bra size converter handles any size and system.
UK E cup sizes across bands
| UK size | US size | Bust (approx. in) | Sister sizes (US) |
|---|---|---|---|
| 30E | 30DDD | 36 | 28G, 32DD |
| 32E | 32DDD | 38 | 30G, 34DD |
| 34E | 34DDD | 40 | 32G, 36DD |
| 36E | 36DDD | 42 | 34G, 38DD |
| 38E | 38DDD | 44 | 36G, 40DD |
The underbust follows the band: just over 32 up to 34 inches for a 34 band, and so on. Our DDD bra size guide covers the same cup from the US side.
Why E causes so much confusion
US and UK sizing match until DD, then split. US brands mostly went DD, DDD, then G; UK brands went DD, E, F. Meanwhile EU sizing never used DD at all, so its E sits where everyone else’s DD is. That’s three different meanings for one letter. The bra cup sizes in order guide lays out every sequence side by side.
How to buy an E cup without guessing
- Find the sizing system on the label or size chart: UK, EU or US.
- Convert from your measured size. If you measure a US 34DDD, look for UK 34E or EU 75F.
- Check the brand’s own chart where it shows both labels.
- Try your sister sizes if the band feels loose: a US 34DDD is also a 32G or 36DD in cup volume.
Shop E cup and DDD bras
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UK E cup bras
Look for UK-sized brands; check the US equivalent on the size chart.
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US DDD bras
The same cup as a UK E.
Search Amazon for us ddd bras (opens in a new tab, affiliate link) -
Full coverage E cups
Seamed cups often hold fuller busts best.
Search Amazon for full coverage e cups (opens in a new tab, affiliate link)
Results are Amazon’s, not our picks. Check the size range, the return policy and the features above before you buy.
Is an E cup big?
It depends on the band. A UK 30E holds about the same as a 34D, while a UK 38E is a full bust. Our guide to what bra size is considered big explains how band and cup work together.
