True-to-Size Millimeter Sizing Comparison
VIONIC Bella II vs VIONIC Uptown
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 Bella II to see your calculated size in the Uptown.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Bella II (US) | Internal Cavity | Uptown Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 3.5 | 240 mm | US 5.5 | 97% | +0.3 mm |
| US 4 | 243 mm | US 6 | 97% | +0.3 mm |
| US 4.5 | 247 mm | US 6.5 | 97% | +0.3 mm |
| US 5 | 250 mm | US 7 | 97% | +0.3 mm |
| US 5.5 | 253 mm | US 7.5 | 97% | +0.3 mm |
| US 6 | 257 mm | US 8 | 97% | +0.3 mm |
| US 6.5 | 260 mm | US 8.5 | 97% | +0.3 mm |
| US 7 | 267 mm | US 9 | 97% | +0.3 mm |
| US 7.5 | 270 mm | US 9.5 | 97% | +0.3 mm |
| US 8 | 273 mm | US 10 | 97% | +0.3 mm |
| US 8.5 | 277 mm | US 10.5 | 97% | +0.3 mm |
| US 9 | 280 mm | US 11 | 97% | +0.3 mm |
| US 9.5 | 283 mm | US 11 | 68% | -2.7 mm |
| US 10 | 287 mm | US 11 | 21% | -6.7 mm |
| US 10.5 | 290 mm | US 11 | 0% | -9.7 mm |
| US 11 | 293 mm | US 11 | 0% | -12.7 mm |
| US 11.5 | 297 mm | US 11 | 0% | -16.7 mm |
| US 12 | 300 mm | US 11 | 0% | -19.7 mm |
| US 12.5 | 303 mm | US 11 | 0% | -22.7 mm |
| US 13 | 307 mm | US 11 | 0% | -26.7 mm |
| US 14 | 313 mm | US 11 | 0% | -32.7 mm |
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Frequently Asked Questions
How does the Bella II size compare to the Uptown?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Bella II has an internal fit offset of 0.36mm compared to 0.64mm for the Uptown.
Do these shoes fit wide feet comfortably?
The Bella II has a roomy/wide width profile, while the Uptown is roomy/wide.