True-to-Size Millimeter Sizing Comparison
Frye Campus 14L vs Frye Harness 12R
Detailed size conversion chart, cavity measurements in millimeters, and crowd-sourced fit advice for choosing your perfect size.
Interactive Size Converter
Select what size you wear in the Campus 14L to see your calculated size in the Harness 12R.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Campus 14L (US) | Internal Cavity | Harness 12R Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 3.5 | 241 mm | US 3.5 | 99% | -0.1 mm |
| US 4 | 244 mm | US 4 | 99% | -0.1 mm |
| US 4.5 | 248 mm | US 4.5 | 99% | -0.1 mm |
| US 5 | 251 mm | US 5 | 99% | -0.1 mm |
| US 5.5 | 254 mm | US 5.5 | 99% | -0.1 mm |
| US 6 | 258 mm | US 6 | 99% | -0.1 mm |
| US 6.5 | 261 mm | US 6.5 | 99% | -0.1 mm |
| US 7 | 268 mm | US 7 | 99% | -0.1 mm |
| US 7.5 | 271 mm | US 7.5 | 99% | -0.1 mm |
| US 8 | 274 mm | US 8 | 99% | -0.1 mm |
| US 8.5 | 278 mm | US 8.5 | 99% | -0.1 mm |
| US 9 | 281 mm | US 9 | 99% | -0.1 mm |
| US 9.5 | 284 mm | US 9.5 | 99% | -0.1 mm |
| US 10 | 288 mm | US 10 | 99% | -0.1 mm |
| US 10.5 | 291 mm | US 10.5 | 99% | -0.1 mm |
| US 11 | 294 mm | US 11 | 99% | -0.1 mm |
| US 11.5 | 298 mm | US 11.5 | 99% | -0.1 mm |
| US 12 | 301 mm | US 12 | 99% | -0.1 mm |
| US 12.5 | 304 mm | US 12.5 | 99% | -0.1 mm |
| US 13 | 308 mm | US 13 | 99% | -0.1 mm |
| US 14 | 314 mm | US 14 | 99% | -0.1 mm |
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Frequently Asked Questions
How does the Campus 14L size compare to the Harness 12R?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Campus 14L has an internal fit offset of 1.24mm compared to 1.12mm for the Harness 12R.
Do these shoes fit wide feet comfortably?
The Campus 14L has a snug/narrow width profile, while the Harness 12R is snug/narrow.