True-to-Size Millimeter Sizing Comparison
Birkenstock Mayari Oiled Leather vs Kelly & Katie Hailee Sandal
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 Mayari Oiled Leather to see your calculated size in the Hailee Sandal.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Mayari Oiled Leather (US) | Internal Cavity | Hailee Sandal Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 4.5 | 237 mm | US 5 | 100% | 0.0 mm |
| US 5 | 241 mm | US 5.5 | 88% | -1.0 mm |
| US 5.5 | 244 mm | US 6 | 88% | -1.0 mm |
| US 6 | 247 mm | US 6.5 | 100% | 0.0 mm |
| US 6.5 | 251 mm | US 7 | 88% | -1.0 mm |
| US 7 | 254 mm | US 7.5 | 88% | -1.0 mm |
| US 7.5 | 257 mm | US 8 | 100% | 0.0 mm |
| US 8 | 261 mm | US 8.5 | 88% | -1.0 mm |
| US 8.5 | 264 mm | US 9 | 65% | +3.0 mm |
| US 9 | 271 mm | US 9.5 | 88% | -1.0 mm |
| US 9.5 | 274 mm | US 10 | 88% | -1.0 mm |
| US 10 | 277 mm | US 10.5 | 100% | 0.0 mm |
| US 10.5 | 281 mm | US 11 | 88% | -1.0 mm |
| US 11 | 284 mm | US 11 | 53% | -4.0 mm |
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Frequently Asked Questions
How does the Mayari Oiled Leather size compare to the Hailee Sandal?
The Hailee Sandal is about 4mm shorter than the Mayari Oiled Leather. We suggest ordering 1/2 size up in Hailee Sandal. The Mayari Oiled Leather has an internal fit offset of 4mm compared to 0mm for the Hailee Sandal.
Do these shoes fit wide feet comfortably?
The Mayari Oiled Leather has a standard medium width profile, while the Hailee Sandal is standard medium.