| AA | AA | Identical labeling in both systems. |
| A | A | Direct match. |
| B | B | Direct match. |
| C | C | Direct match. |
| D | D | No change required. |
| DD | DD | US also prints DD for this half step. |
| E | DDD / F | US combines this volume into DDD or single-letter F. |
| F | G | US moves forward one letter after dropping the extra F. |
| FF | H | Insert the US H when the second F disappears. |
| G | I | Advance one letter when converting to the US alphabet. |
| GG | J | US J represents the GG half step. |
| H | K | Return to the single K at this depth. |
| HH | L | US L covers the HH half step. |
| J | M | US M is the nearest match for UK J. |
| JJ | N | Move to US N when you see JJ on a UK label. |
| K | O | US O captures UK K volume. |
| KK | P | Specialty US brands use P for UK KK. |
UK 32FF -> US 32H
US cups jump forward when FF is removed, landing on H.
UK 34G -> US 34I
Move ahead one letter because US sizing lacks the intermediate GG.
UK 30HH -> US 30L
Replace the doubled letter with the next single US letter.
UK 36J -> US 36M
Upper end cup letters shift forward several positions in US charts.
- Bravissimo
- Figleaves
- John Lewis
- Marks & Spencer
- Bare Necessities
- HerRoom
- ThirdLove
- Soma
- Amazon US
- Nordstrom
- Bloomingdale's
- Dillard's