Ring Sizes Around UK Z2
| US | UK | ISO / EU | JP / KR | Diameter (mm) | Circumference (mm) |
| 12.5 | Y | 68 | 27 | 21.8 | 68.5 |
| 13 | Z | 70 | 28 | 22.2 | 69.7 |
| 13.5 | Z1 | 71 | 28+ | 22.6 | 71 |
| 14 | Z2 | 72 | 28+ | 23 | 72.3 |
Frequently Asked Questions
Does UK Z2 round up or down in US?
Round up to pass the knuckle and allow for swelling; a made-to-order band at the top of the scale is costly to resize, so build the allowance in once.
See a number that looks off? Report an error on this page.