US to Circumference (mm) Ring Size (Comfort Fit)
1 US value = 39.090209 Circumference value · profile-dependent conversion · context: size system and fit profile
Direct Answer
1 US value equals 39.090209 Circumference value
This result depends on the selected profile context: size system and fit profile.
For 4 US value, this profile returns 46.750669 Circumference value.
Converter Calculator
1 US value =
39.090209 Circumference (mm) value
Explanation
US converts to Circumference (mm) by normalizing to ring diameter in millimeters, then remapping to the target system. Fit profile fixed: Comfort Fit.
From US value to Circumference value, results depend on the selected size system and fit profile and stay consistent with that profile across table rows and calculator input.
Read more
Keep the same profile in both directions to avoid mixing lookup systems that use different size mappings.
Common Conversion Values
| US value | Circumference (mm) value |
|---|---|
| 4 | 46.750669 |
| 5 | 49.304155 |
| 6 | 51.857642 |
| 7 | 54.411128 |
| 8 | 56.964615 |
| 9 | 59.518101 |
| 10 | 62.071588 |
| 11 | 64.625074 |
| 12 | 67.178561 |
| 13 | 69.732047 |