True-to-Size Millimeter Sizing Comparison
VIONIC Beach Pismo 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 Beach Pismo to see your calculated size in the Uptown.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Beach Pismo (US) | Internal Cavity | Uptown Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 4.5 | 233 mm | US 4.5 | 91% | +0.7 mm |
| US 5 | 237 mm | US 5 | 91% | +0.7 mm |
| US 5.5 | 240 mm | US 5.5 | 91% | +0.7 mm |
| US 6 | 243 mm | US 6 | 91% | +0.7 mm |
| US 6.5 | 247 mm | US 6.5 | 91% | +0.7 mm |
| US 7 | 250 mm | US 7 | 91% | +0.7 mm |
| US 7.5 | 253 mm | US 7.5 | 91% | +0.7 mm |
| US 8 | 257 mm | US 8 | 91% | +0.7 mm |
| US 8.5 | 260 mm | US 8.5 | 91% | +0.7 mm |
| US 9 | 267 mm | US 9 | 91% | +0.7 mm |
| US 9.5 | 270 mm | US 9.5 | 91% | +0.7 mm |
| US 10 | 273 mm | US 10 | 91% | +0.7 mm |
| US 10.5 | 277 mm | US 10.5 | 91% | +0.7 mm |
| US 11 | 280 mm | US 11 | 91% | +0.7 mm |
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Frequently Asked Questions
How does the Beach Pismo size compare to the Uptown?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Beach Pismo has an internal fit offset of -0.08mm compared to 0.64mm for the Uptown.
Do these shoes fit wide feet comfortably?
The Beach Pismo has a snug/narrow width profile, while the Uptown is roomy/wide.