ISO 57 in US Ring Size
Inner circumference:54.5–59.5mm
Size Chart
| ISO | US | UK |
|---|---|---|
| 53 | 6.5 | M |
| 54 | 7 | N |
| 56 | 7.5 | O |
| 57 | 8 | P |
| 58 | 8.5 | Q |
| 60 | 9 | R |
| 61 | 9.5 | S |
Frequently Asked Questions
What is ISO 57 in US rings size?
ISO 57 converts to approximately US 8 in rings sizing.
How do I convert ISO 57 to US?
ISO 57 equals US 8. This conversion is based on standard sizing charts, but may vary by brand.
What ring size should I order if I'm ISO 57?
If your ring size is ISO 57, order US 8. When in doubt, go slightly larger as rings can be resized down.