US Fitted to Inner Diameter (mm) Hat Size (Loose Fit)
1 US Fitted value = 25.4 Inner Diameter value · profile-dependent conversion · context: size system and fit profile
Direct Answer
1 US Fitted value equals 25.4 Inner Diameter value
This result depends on the selected profile context: size system and fit profile.
For 6 US Fitted value, this profile returns 152.4 Inner Diameter value.
Converter Calculator
1 US Fitted value =
25.4 Inner Diameter (mm) value
Explanation
US Fitted converts to Inner Diameter (mm) by normalizing to head circumference in millimeters, then mapping to the destination system. Fit profile fixed: Loose Fit.
From US Fitted value to Inner Diameter value, results depend on the selected size system and fit profile and stay consistent with that profile across table rows and calculator input.
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Keep the same profile in both directions to avoid mixing lookup systems that use different size mappings.
Common Conversion Values
| US Fitted value | Inner Diameter (mm) value |
|---|---|
| 6 | 152.4 |
| 6.5 | 165.1 |
| 7 | 177.8 |
| 7.25 | 184.15 |
| 7.5 | 190.5 |
| 8 | 203.2 |
| 54 | 1,371.6 |
| 56 | 1,422.4 |
| 58 | 1,473.2 |
| 60 | 1,524 |
| 62 | 1,574.8 |