True-to-Size Millimeter Sizing Comparison
Cobb Hill Angelina vs Cobb Hill Petra
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 Angelina to see your calculated size in the Petra.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Angelina (US) | Internal Cavity | Petra Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 3.5 | 241 mm | US 3.5 | 96% | -0.4 mm |
| US 4 | 244 mm | US 4 | 96% | -0.4 mm |
| US 4.5 | 248 mm | US 4.5 | 96% | -0.4 mm |
| US 5 | 251 mm | US 5 | 96% | -0.4 mm |
| US 5.5 | 254 mm | US 5.5 | 96% | -0.4 mm |
| US 6 | 258 mm | US 6 | 96% | -0.4 mm |
| US 6.5 | 261 mm | US 6.5 | 96% | -0.4 mm |
| US 7 | 268 mm | US 7 | 96% | -0.4 mm |
| US 7.5 | 271 mm | US 7.5 | 96% | -0.4 mm |
| US 8 | 274 mm | US 8 | 96% | -0.4 mm |
| US 8.5 | 278 mm | US 8.5 | 96% | -0.4 mm |
| US 9 | 281 mm | US 9 | 96% | -0.4 mm |
| US 9.5 | 284 mm | US 9.5 | 96% | -0.4 mm |
| US 10 | 288 mm | US 10 | 96% | -0.4 mm |
| US 10.5 | 291 mm | US 10.5 | 96% | -0.4 mm |
| US 11 | 294 mm | US 11 | 96% | -0.4 mm |
| US 11.5 | 298 mm | US 11.5 | 96% | -0.4 mm |
| US 12 | 301 mm | US 12 | 96% | -0.4 mm |
| US 12.5 | 304 mm | US 12.5 | 96% | -0.4 mm |
| US 13 | 308 mm | US 13 | 96% | -0.4 mm |
| US 14 | 314 mm | US 14 | 96% | -0.4 mm |
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Frequently Asked Questions
How does the Angelina size compare to the Petra?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Angelina has an internal fit offset of 0.56mm compared to 0.2mm for the Petra.
Do these shoes fit wide feet comfortably?
The Angelina has a snug/narrow width profile, while the Petra is roomy/wide.