US to UK cup chart
| US cup | UK cup |
|---|---|
| AA | AA |
| A | A |
| B | B |
| C | C |
| D | D |
| DD | DD |
| DDD/F | E |
| G | F |
| H | FF |
| I | G |
| J | GG |
| K | H |
| L | HH |
American lettering is not standardised
The chart shows the pattern most US brands follow: D, DD, DDD (or F), G, H, I, J. It is not universal. You will also meet:
- DDDD in place of G,
- F and G used as separate steps after DDD by some brands, which shifts every later letter by one, and
- brands that follow the UK ladder outright, usually British brands selling in America.
Because of this, the safest way to convert from a US size is to count steps. Find out how many cups above D the size is in that brand's own chart, then count the same number of steps up the UK ladder: D, DD, E, F, FF, G, GG, H.
If you are an American shopper buying British brands
Panache, Freya, Elomi, Curvy Kate and similar brands are sold in the US in UK sizes. Convert your US size to UK before ordering, and look for double letters such as FF and GG in the size list as confirmation that the listing is in UK sizing.
If you are in the UK with a US-sized bra
To find what you would wear in British brands, convert the cup with the tool above and keep the band. Then check the fit, because American and British brands often differ in cup shape as well as labelling. The comparison of the two systems is in UK vs US bra sizes.
Frequently asked questions
What is a US DDD in UK sizes?
A UK E. DDD does not exist in UK sizing, and the cup one step above DD is called E.
What is a US 34G in UK sizes?
In the most common American lettering, a UK 34F. Some US brands letter differently above DDD, so check the brand's chart.
Is a US 36C the same as a UK 36C?
Yes. Bands are the same, and cups AA to DD carry the same labels in both countries.
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