True-to-Size Millimeter Sizing Comparison
Sam Edelman Loraine vs Sam Edelman Petty
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 Loraine to see your calculated size in the Petty.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Loraine (US) | Internal Cavity | Petty Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 4.5 | 234 mm | US 5 | 63% | +3.2 mm |
| US 5 | 238 mm | US 5.5 | 74% | +2.2 mm |
| US 5.5 | 241 mm | US 6 | 74% | +2.2 mm |
| US 6 | 244 mm | US 6.5 | 63% | +3.2 mm |
| US 6.5 | 248 mm | US 7 | 74% | +2.2 mm |
| US 7 | 251 mm | US 7.5 | 74% | +2.2 mm |
| US 7.5 | 254 mm | US 8 | 63% | +3.2 mm |
| US 8 | 258 mm | US 8.5 | 74% | +2.2 mm |
| US 8.5 | 261 mm | US 8.5 | 90% | -0.8 mm |
| US 9 | 268 mm | US 9.5 | 74% | +2.2 mm |
| US 9.5 | 271 mm | US 10 | 74% | +2.2 mm |
| US 10 | 274 mm | US 10.5 | 63% | +3.2 mm |
| US 10.5 | 278 mm | US 11 | 74% | +2.2 mm |
| US 11 | 281 mm | US 11 | 90% | -0.8 mm |
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Frequently Asked Questions
How does the Loraine size compare to the Petty?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Loraine has an internal fit offset of 0.88mm compared to 0.04mm for the Petty.
Do these shoes fit wide feet comfortably?
The Loraine has a snug/narrow width profile, while the Petty is snug/narrow.