True-to-Size Millimeter Sizing Comparison
Merrell Moab 3 vs Sam Edelman Penny Leather Riding
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 Moab 3 to see your calculated size in the Penny Leather Riding.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Moab 3 (US) | Internal Cavity | Penny Leather Riding Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 7 | 267 mm | US 7.5 | 68% | +2.7 mm |
| US 7.5 | 270 mm | US 8 | 68% | +2.7 mm |
| US 8 | 273 mm | US 8 | 96% | -0.3 mm |
| US 8.5 | 277 mm | US 9 | 68% | +2.7 mm |
| US 9 | 280 mm | US 9.5 | 68% | +2.7 mm |
| US 9.5 | 283 mm | US 9.5 | 96% | -0.3 mm |
| US 10 | 287 mm | US 10.5 | 68% | +2.7 mm |
| US 10.5 | 290 mm | US 11 | 68% | +2.7 mm |
| US 11 | 293 mm | US 11 | 96% | -0.3 mm |
| US 11.5 | 297 mm | US 12 | 68% | +2.7 mm |
| US 12 | 300 mm | US 12.5 | 68% | +2.7 mm |
| US 12.5 | 303 mm | US 12.5 | 96% | -0.3 mm |
| US 13 | 307 mm | US 13 | 96% | -0.3 mm |
| US 14 | 313 mm | US 14 | 96% | -0.3 mm |
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Frequently Asked Questions
How does the Moab 3 size compare to the Penny Leather Riding?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Moab 3 has an internal fit offset of -0.16mm compared to -0.48mm for the Penny Leather Riding.
Do these shoes fit wide feet comfortably?
The Moab 3 has a roomy/wide width profile, while the Penny Leather Riding is snug/narrow.