True-to-Size Millimeter Sizing Comparison
Mix No. 6 Aliciana vs Mix No. 6 Sundra
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 Aliciana to see your calculated size in the Sundra.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Aliciana (US) | Internal Cavity | Sundra Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 4.5 | 233 mm | US 4.5 | 100% | -0.0 mm |
| US 5 | 237 mm | US 5 | 100% | -0.0 mm |
| US 5.5 | 240 mm | US 5.5 | 100% | -0.0 mm |
| US 6 | 243 mm | US 6 | 100% | -0.0 mm |
| US 6.5 | 247 mm | US 6.5 | 100% | -0.0 mm |
| US 7 | 250 mm | US 7 | 100% | -0.0 mm |
| US 7.5 | 253 mm | US 7.5 | 100% | -0.0 mm |
| US 8 | 257 mm | US 8 | 100% | -0.0 mm |
| US 8.5 | 260 mm | US 8.5 | 100% | -0.0 mm |
| US 9 | 267 mm | US 9 | 100% | -0.0 mm |
| US 9.5 | 270 mm | US 9.5 | 100% | -0.0 mm |
| US 10 | 273 mm | US 10 | 100% | -0.0 mm |
| US 10.5 | 277 mm | US 10.5 | 100% | -0.0 mm |
| US 11 | 280 mm | US 11 | 100% | -0.0 mm |
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Frequently Asked Questions
How does the Aliciana size compare to the Sundra?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Aliciana has an internal fit offset of 0.16mm compared to 0.12mm for the Sundra.
Do these shoes fit wide feet comfortably?
The Aliciana has a snug/narrow width profile, while the Sundra is roomy/wide.