A US band converts to EU cleanly (it’s just inches translated to a 5 cm step) — a US 34 band is an EU 75. Cup letters match too, but only through D; a US DD is an EU E, not a US-labelled D-plus.
Band size is the reliable half of this conversion: US and UK bands are measured in inches, and the EU simply restates that measurement in 5 cm steps starting at 60 cm. A US 32 band is always an EU 70, a US 34 is always an EU 75, and so on up the range — there's no brand variance here because it's a direct unit conversion, not a label.
Cup size is where US-to-EU gets unreliable if you go by the letter alone. A, B, C, and D are identical in both systems. Past D the EU switches to single letters (E, F, G…) while many US brands keep adding D's (DD, DDD) before switching to G — so a US DD is an EU E, and a US DDD is an EU F, not simply "the EU version of DD." This converter looks each cup up directly rather than assuming the letters line up.
| Band (US) | Band (EU) |
|---|---|
| 28 | 60 |
| 30 | 65 |
| 32 | 70 |
| 34 | 75 |
| 36 | 80 |
| 38 | 85 |
| 40 | 90 |
| 42 | 95 |
| 44 | 100 |
| Cup (US) | Cup (EU) |
|---|---|
| AA | AA |
| A | A |
| B | B |
| C | C |
| D | D |
| DD / E | E |
| DDD / F | F |
| G / DDDD | G |
| H | H |
| I | I |
| J | J |
| K | K |
Cup letters match through D; above D the systems diverge, which is why the cup half of this chart is a lookup, never a formula.
Yes — band and cup both match directly: US 34 band = EU 75, and B cup is identical in both systems.
A US DD cup is an EU E. The US and EU cup letters only match up through D; past that point they follow different labelling paths.
No — EU band sizes are a direct centimeter restatement of the US/UK inch band, so they don’t vary by brand the way cup letters above D can.