True-to-Size Millimeter Sizing Comparison
Frye Harness 12R vs Frye Melanie Slip On
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 Harness 12R to see your calculated size in the Melanie Slip On.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Harness 12R (US) | Internal Cavity | Melanie Slip On Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 3.5 | 241 mm | US 4 | 81% | +1.6 mm |
| US 4 | 244 mm | US 4.5 | 69% | +2.6 mm |
| US 4.5 | 248 mm | US 5 | 81% | +1.6 mm |
| US 5 | 251 mm | US 5.5 | 81% | +1.6 mm |
| US 5.5 | 254 mm | US 6 | 69% | +2.6 mm |
| US 6 | 258 mm | US 6.5 | 81% | +1.6 mm |
| US 6.5 | 261 mm | US 6.5 | 83% | -1.4 mm |
| US 7 | 268 mm | US 7.5 | 81% | +1.6 mm |
| US 7.5 | 271 mm | US 8 | 81% | +1.6 mm |
| US 8 | 274 mm | US 8.5 | 69% | +2.6 mm |
| US 8.5 | 278 mm | US 9 | 81% | +1.6 mm |
| US 9 | 281 mm | US 9.5 | 81% | +1.6 mm |
| US 9.5 | 284 mm | US 10 | 69% | +2.6 mm |
| US 10 | 288 mm | US 10.5 | 81% | +1.6 mm |
| US 10.5 | 291 mm | US 11 | 81% | +1.6 mm |
| US 11 | 294 mm | US 11.5 | 69% | +2.6 mm |
| US 11.5 | 298 mm | US 12 | 81% | +1.6 mm |
| US 12 | 301 mm | US 12.5 | 81% | +1.6 mm |
| US 12.5 | 304 mm | US 13 | 69% | +2.6 mm |
| US 13 | 308 mm | US 14 | 46% | +4.6 mm |
| US 14 | 314 mm | US 14 | 83% | -1.4 mm |
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Frequently Asked Questions
How does the Harness 12R size compare to the Melanie Slip On?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Harness 12R has an internal fit offset of 1.12mm compared to -0.28mm for the Melanie Slip On.
Do these shoes fit wide feet comfortably?
The Harness 12R has a snug/narrow width profile, while the Melanie Slip On is snug/narrow.