True-to-Size Millimeter Sizing Comparison
Crocs Classic Lined Clog 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 Classic Lined Clog to see your calculated size in the OOahh.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Classic Lined Clog (US) | Internal Cavity | OOahh Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 7 | 267 mm | US 7 | 94% | +0.5 mm |
| US 7.5 | 270 mm | US 7.5 | 94% | +0.5 mm |
| US 8 | 273 mm | US 8 | 94% | +0.5 mm |
| US 8.5 | 277 mm | US 8.5 | 94% | +0.5 mm |
| US 9 | 280 mm | US 9 | 94% | +0.5 mm |
| US 9.5 | 283 mm | US 9.5 | 94% | +0.5 mm |
| US 10 | 287 mm | US 10 | 94% | +0.5 mm |
| US 10.5 | 290 mm | US 10.5 | 94% | +0.5 mm |
| US 11 | 293 mm | US 11 | 94% | +0.5 mm |
| US 11.5 | 297 mm | US 11.5 | 94% | +0.5 mm |
| US 12 | 300 mm | US 12 | 94% | +0.5 mm |
| US 12.5 | 303 mm | US 12.5 | 94% | +0.5 mm |
| US 13 | 307 mm | US 13 | 94% | +0.5 mm |
| US 14 | 313 mm | US 14 | 94% | +0.5 mm |
Related Comparisons
crocs ComparisonClassic Clogs vs Classic Lined ClogView Sizing ComparisonDirect RivalryAdilette Comfort vs Classic Lined ClogView Sizing ComparisonDirect RivalryAdilette Aqua vs Classic Lined ClogView Sizing ComparisonDirect RivalryClassic Lined Clog vs OOriginal ThongView Sizing ComparisonDirect RivalryClassic Clogs vs OOahhView Sizing ComparisonDirect RivalryAdilette Comfort vs OOahhView Sizing Comparison
Frequently Asked Questions
How does the Classic Lined Clog size compare to the OOahh?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Classic Lined Clog has an internal fit offset of -0.36mm compared to 0.16mm for the OOahh.
Do these shoes fit wide feet comfortably?
The Classic Lined Clog has a snug/narrow width profile, while the OOahh is snug/narrow.