Ring Sizes Around UK S
| US | UK | ISO / EU | JP / KR | Diameter (mm) | Circumference (mm) |
| 8 | P | 57 | 16 | 18.1 | 57 |
| 8.5 | Q | 58 | 18 | 18.6 | 58.3 |
| 9 | R | 60 | 19 | 18.9 | 59.5 |
| 9.5 | S | 61 | 20 | 19.4 | 60.8 |
| 10 | T | 62 | 21 | 19.8 | 62.1 |
| 10.5 | U | 63 | 23 | 20.2 | 63.4 |
| 11 | V | 65 | 24 | 20.6 | 64.6 |
Frequently Asked Questions
Does UK S round up or down in US?
Size to the knuckle; a snug 9.5 on a larger finger leaves little margin for the daily swelling that can add most of a size by evening.
See a number that looks off? Report an error on this page.