True-to-Size Millimeter Sizing Comparison
Johnston & Murphy McGuffey Casual vs Johnston & Murphy Upton Plain Toe
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 McGuffey Casual to see your calculated size in the Upton Plain Toe.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| McGuffey Casual (US) | Internal Cavity | Upton Plain Toe Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 7 | 267 mm | US 7 | 96% | +0.4 mm |
| US 7.5 | 270 mm | US 7.5 | 96% | +0.4 mm |
| US 8 | 273 mm | US 8 | 96% | +0.4 mm |
| US 8.5 | 277 mm | US 8.5 | 96% | +0.4 mm |
| US 9 | 280 mm | US 9 | 96% | +0.4 mm |
| US 9.5 | 283 mm | US 9.5 | 96% | +0.4 mm |
| US 10 | 287 mm | US 10 | 96% | +0.4 mm |
| US 10.5 | 290 mm | US 10.5 | 96% | +0.4 mm |
| US 11 | 293 mm | US 11 | 96% | +0.4 mm |
| US 11.5 | 297 mm | US 11.5 | 96% | +0.4 mm |
| US 12 | 300 mm | US 12 | 96% | +0.4 mm |
| US 12.5 | 303 mm | US 12.5 | 96% | +0.4 mm |
| US 13 | 307 mm | US 13 | 96% | +0.4 mm |
| US 14 | 313 mm | US 14 | 96% | +0.4 mm |
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Frequently Asked Questions
How does the McGuffey Casual size compare to the Upton Plain Toe?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The McGuffey Casual has an internal fit offset of -0.36mm compared to 0mm for the Upton Plain Toe.
Do these shoes fit wide feet comfortably?
The McGuffey Casual has a snug/narrow width profile, while the Upton Plain Toe is snug/narrow.