True-to-Size Millimeter Sizing Comparison
HOKA Ora Recovery Slide 3 vs OOFOS OOahh
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 Slide 3 to see your calculated size in the OOahh.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Ora Recovery Slide 3 (US) | Internal Cavity | OOahh Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 5 | 241 mm | US 7 | 0% | +26.2 mm |
| US 5.5 | 245 mm | US 7 | 0% | +21.9 mm |
| US 6 | 250 mm | US 7 | 0% | +17.2 mm |
| US 6.5 | 254 mm | US 7 | 0% | +13.2 mm |
| US 7 | 259 mm | US 7 | 3% | +8.2 mm |
| US 7.5 | 263 mm | US 7 | 54% | +3.9 mm |
| US 7 | 268 mm | US 7.5 | 74% | +2.2 mm |
| US 7.5 | 272 mm | US 8 | 86% | +1.2 mm |
| US 8 | 277 mm | US 8.5 | 94% | +0.5 mm |
| US 8.5 | 281 mm | US 9.5 | 74% | +2.2 mm |
| US 9 | 285 mm | US 10 | 78% | +1.9 mm |
| US 9.5 | 290 mm | US 10.5 | 98% | +0.2 mm |
| US 10 | 294 mm | US 11.5 | 62% | +3.2 mm |
| US 10.5 | 299 mm | US 12 | 86% | +1.2 mm |
| US 11 | 303 mm | US 12.5 | 98% | +0.2 mm |
| US 11.5 | 308 mm | US 13 | 91% | -0.8 mm |
| US 12 | 312 mm | US 14 | 86% | +1.2 mm |
| US 13 | 320 mm | US 14 | 20% | -6.8 mm |
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Frequently Asked Questions
How does the Ora Recovery Slide 3 size compare to the OOahh?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Ora Recovery Slide 3 has an internal fit offset of 0.96mm compared to 0.16mm for the OOahh.
Do these shoes fit wide feet comfortably?
The Ora Recovery Slide 3 has a roomy/wide width profile, while the OOahh is snug/narrow.