True-to-Size Millimeter Sizing Comparison
ASICS GEL-Nimbus 27 vs HOKA Bondi 9
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 GEL-Nimbus 27 to see your calculated size in the Bondi 9.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| GEL-Nimbus 27 (US) | Internal Cavity | Bondi 9 Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 3.5 | 238 mm | US 5 | 86% | +1.2 mm |
| US 4 | 241 mm | US 5.5 | 64% | +3.0 mm |
| US 4.5 | 246 mm | US 6 | 68% | +2.7 mm |
| US 5 | 251 mm | US 6.5 | 80% | +1.7 mm |
| US 5.5 | 256 mm | US 7 | 80% | +1.7 mm |
| US 6 | 261 mm | US 7.5 | 88% | +1.0 mm |
| US 6.5 | 266 mm | US 7 | 91% | +0.7 mm |
| US 7 | 268 mm | US 7.5 | 74% | +2.2 mm |
| US 7.5 | 271 mm | US 7.5 | 97% | -0.3 mm |
| US 8 | 276 mm | US 8.5 | 56% | +3.7 mm |
| US 8.5 | 281 mm | US 9 | 64% | +3.0 mm |
| US 9 | 286 mm | US 9.5 | 68% | +2.7 mm |
| US 9.5 | 291 mm | US 10 | 80% | +1.7 mm |
| US 10 | 296 mm | US 10.5 | 80% | +1.7 mm |
| US 10.5 | 298 mm | US 11 | 62% | +3.2 mm |
| US 11 | 301 mm | US 11 | 91% | +0.7 mm |
| US 11.5 | 306 mm | US 11.5 | 91% | +0.7 mm |
| US 12 | 311 mm | US 12 | 97% | -0.3 mm |
| US 12.5 | 316 mm | US 13 | 68% | +2.7 mm |
| US 13 | 321 mm | US 13 | 73% | -2.3 mm |
| US 14 | 326 mm | US 13 | 14% | -7.3 mm |
| US 15 | 336 mm | US 13 | 0% | -17.3 mm |
| US 16 | 346 mm | US 13 | 0% | -27.3 mm |
Related Comparisons
Direct RivalryDuramo SL 10 vs GEL-Nimbus 27View Sizing ComparisonDirect RivalryAdizero EVO SL vs GEL-Nimbus 27View Sizing ComparisonDirect RivalryGEL-Nimbus 27 vs Bondi Slip ResistantView Sizing ComparisonDirect RivalryTree Runner vs GEL-Nimbus 27View Sizing ComparisonDirect RivalryDuramo SL 10 vs Bondi 9View Sizing ComparisonDirect RivalryAdizero EVO SL vs Bondi 9View Sizing Comparison
Frequently Asked Questions
How does the GEL-Nimbus 27 size compare to the Bondi 9?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The GEL-Nimbus 27 has an internal fit offset of -0.08mm compared to -0.36mm for the Bondi 9.
Do these shoes fit wide feet comfortably?
The GEL-Nimbus 27 has a snug/narrow width profile, while the Bondi 9 is snug/narrow.