True-to-Size Millimeter Sizing Comparison
Adidas Stan Smith vs Sperry AO 2 Eye Leather MM
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 Stan Smith to see your calculated size in the AO 2 Eye Leather MM.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Stan Smith (US) | Internal Cavity | AO 2 Eye Leather MM Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 3.5 | 248 mm | US 4.5 | 88% | -1.0 mm |
| US 4 | 251 mm | US 5 | 88% | -1.0 mm |
| US 4.5 | 255 mm | US 5.5 | 76% | -2.0 mm |
| US 5 | 258 mm | US 6 | 88% | -1.0 mm |
| US 5.5 | 261 mm | US 6.5 | 88% | -1.0 mm |
| US 6 | 265 mm | US 7 | 76% | +2.0 mm |
| US 6.5 | 268 mm | US 7 | 88% | -1.0 mm |
| US 7 | 275 mm | US 8 | 76% | -2.0 mm |
| US 7.5 | 278 mm | US 8.5 | 88% | -1.0 mm |
| US 8 | 281 mm | US 9 | 88% | -1.0 mm |
| US 8.5 | 285 mm | US 9.5 | 76% | -2.0 mm |
| US 9 | 288 mm | US 10 | 88% | -1.0 mm |
| US 9.5 | 291 mm | US 10.5 | 88% | -1.0 mm |
| US 10 | 295 mm | US 11 | 76% | -2.0 mm |
| US 10.5 | 298 mm | US 11.5 | 88% | -1.0 mm |
| US 11 | 301 mm | US 12 | 88% | -1.0 mm |
| US 11.5 | 305 mm | US 12.5 | 76% | -2.0 mm |
| US 12 | 308 mm | US 13 | 88% | -1.0 mm |
| US 12.5 | 311 mm | US 14 | 76% | +2.0 mm |
| US 13 | 315 mm | US 14 | 76% | -2.0 mm |
| US 14 | 321 mm | US 14 | 5% | -8.0 mm |
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Frequently Asked Questions
How does the Stan Smith size compare to the AO 2 Eye Leather MM?
The AO 2 Eye Leather MM is about 8mm shorter than the Stan Smith. We suggest ordering 1 full size up in AO 2 Eye Leather MM. The Stan Smith has an internal fit offset of 8mm compared to 0mm for the AO 2 Eye Leather MM.
Do these shoes fit wide feet comfortably?
The Stan Smith has a standard medium width profile, while the AO 2 Eye Leather MM is standard medium.