ISO 51 in US Ring Size
Inner circumference:48.1–53.1mm
Size Chart
| ISO | US | UK |
|---|---|---|
| 47 | 4 | H |
| 48 | 4.5 | I |
| 49 | 5 | J |
| 51 | 5.5 | K |
| 52 | 6 | L |
| 53 | 6.5 | M |
| 54 | 7 | N |
Frequently Asked Questions
What is ISO 51 in US rings size?
ISO 51 converts to approximately US 5.5 in rings sizing.
How do I convert ISO 51 to US?
ISO 51 equals US 5.5. This conversion is based on standard sizing charts, but may vary by brand.
What ring size should I order if I'm ISO 51?
If your ring size is ISO 51, order US 5.5. When in doubt, go slightly larger as rings can be resized down.