True-to-Size Millimeter Sizing Comparison
HOKA Bondi 9 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 Bondi 9 to see your calculated size in the Cohesion 17.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Bondi 9 (US) | Internal Cavity | Cohesion 17 Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 5 | 240 mm | US 4 | 96% | -0.4 mm |
| US 5.5 | 244 mm | US 4.5 | 72% | +2.3 mm |
| US 6 | 249 mm | US 4.5 | 72% | -2.4 mm |
| US 6.5 | 253 mm | US 4.5 | 25% | -6.4 mm |
| US 7 | 258 mm | US 7 | 0% | +8.6 mm |
| US 7.5 | 262 mm | US 7 | 49% | +4.3 mm |
| US 7 | 267 mm | US 7.5 | 69% | +2.6 mm |
| US 7.5 | 271 mm | US 8 | 81% | +1.6 mm |
| US 8 | 275 mm | US 8.5 | 53% | +3.9 mm |
| US 8.5 | 280 mm | US 9 | 69% | +2.6 mm |
| US 9 | 284 mm | US 9.5 | 72% | +2.3 mm |
| US 9.5 | 289 mm | US 10 | 57% | +3.6 mm |
| US 10 | 293 mm | US 10 | 96% | -0.4 mm |
| US 10.5 | 298 mm | US 11 | 81% | +1.6 mm |
| US 11 | 302 mm | US 11.5 | 45% | +4.6 mm |
| US 11.5 | 307 mm | US 12 | 69% | +2.6 mm |
| US 12 | 311 mm | US 12 | 84% | -1.4 mm |
| US 13 | 319 mm | US 13 | 96% | -0.4 mm |
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Frequently Asked Questions
How does the Bondi 9 size compare to the Cohesion 17?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Bondi 9 has an internal fit offset of -0.36mm compared to -0.72mm for the Cohesion 17.
Do these shoes fit wide feet comfortably?
The Bondi 9 has a snug/narrow width profile, while the Cohesion 17 is snug/narrow.