True-to-Size Millimeter Sizing Comparison
Nike Vomero 18 vs Saucony Cohesion 17
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 Vomero 18 to see your calculated size in the Cohesion 17.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Vomero 18 (US) | Internal Cavity | Cohesion 17 Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 7 | 271 mm | US 7.5 | 88% | -1.0 mm |
| US 7.5 | 274 mm | US 8 | 88% | -1.0 mm |
| US 8 | 277 mm | US 8.5 | 100% | 0.0 mm |
| US 8.5 | 281 mm | US 9 | 88% | -1.0 mm |
| US 9 | 284 mm | US 9.5 | 88% | -1.0 mm |
| US 9.5 | 287 mm | US 10 | 100% | 0.0 mm |
| US 10 | 291 mm | US 10.5 | 88% | -1.0 mm |
| US 10.5 | 294 mm | US 11 | 88% | -1.0 mm |
| US 11 | 297 mm | US 11.5 | 100% | 0.0 mm |
| US 11.5 | 301 mm | US 12 | 88% | -1.0 mm |
| US 12 | 304 mm | US 12.5 | 88% | -1.0 mm |
| US 12.5 | 307 mm | US 13 | 100% | 0.0 mm |
| US 13 | 311 mm | US 14 | 76% | +2.0 mm |
| US 14 | 317 mm | US 14 | 53% | -4.0 mm |
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Frequently Asked Questions
How does the Vomero 18 size compare to the Cohesion 17?
The Cohesion 17 is about 4mm shorter than the Vomero 18. We suggest ordering 1/2 size up in Cohesion 17. The Vomero 18 has an internal fit offset of 4mm compared to 0mm for the Cohesion 17.
Do these shoes fit wide feet comfortably?
The Vomero 18 has a standard medium width profile, while the Cohesion 17 is standard medium.