True-to-Size Millimeter Sizing Comparison
HOKA Ora Recovery Flip vs Kelly & Katie Hailee
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 Ora Recovery Flip to see your calculated size in the Hailee.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Ora Recovery Flip (US) | Internal Cavity | Hailee Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| EU 36 | 240 mm | US 5.5 | 95% | +0.4 mm |
| EU 36 2/3 | 244 mm | US 6.5 | 63% | +3.1 mm |
| EU 37 1/3 | 249 mm | US 7 | 83% | +1.4 mm |
| EU 38 | 253 mm | US 7.5 | 95% | +0.4 mm |
| EU 38 2/3 | 258 mm | US 8.5 | 71% | +2.4 mm |
| EU 39 1/3 | 262 mm | US 8.5 | 78% | -1.9 mm |
| EU 40 | 267 mm | US 9 | 95% | +0.4 mm |
| EU 40 2/3 | 271 mm | US 10 | 71% | +2.4 mm |
| EU 41 1/3 | 275 mm | US 10.5 | 79% | +1.7 mm |
| EU 42 | 280 mm | US 11 | 95% | +0.4 mm |
| EU 42 2/3 | 284 mm | US 11 | 54% | -3.9 mm |
| EU 43 1/3 | 289 mm | US 11 | 0% | -8.6 mm |
| EU 44 | 293 mm | US 11 | 0% | -12.6 mm |
| EU 44 2/3 | 298 mm | US 11 | 0% | -17.6 mm |
| EU 45 1/3 | 302 mm | US 11 | 0% | -21.6 mm |
| EU 46 | 307 mm | US 11 | 0% | -26.6 mm |
| EU 46 2/3 | 311 mm | US 11 | 0% | -30.6 mm |
| EU 48 | 319 mm | US 11 | 0% | -38.6 mm |
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Frequently Asked Questions
How does the Ora Recovery Flip size compare to the Hailee?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Ora Recovery Flip has an internal fit offset of -0.32mm compared to 0.12mm for the Hailee.
Do these shoes fit wide feet comfortably?
The Ora Recovery Flip has a roomy/wide width profile, while the Hailee is snug/narrow.