True-to-Size Millimeter Sizing Comparison
SOUL Naturalizer Kacy Loafer vs SOUL Naturalizer Tia Platform
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 Kacy Loafer to see your calculated size in the Tia Platform.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Kacy Loafer (US) | Internal Cavity | Tia Platform Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 4.5 | 233 mm | US 4.5 | 97% | -0.2 mm |
| US 5 | 237 mm | US 5 | 97% | -0.2 mm |
| US 5.5 | 240 mm | US 5.5 | 97% | -0.2 mm |
| US 6 | 243 mm | US 6 | 97% | -0.2 mm |
| US 6.5 | 247 mm | US 6.5 | 97% | -0.2 mm |
| US 7 | 250 mm | US 7 | 97% | -0.2 mm |
| US 7.5 | 253 mm | US 7.5 | 97% | -0.2 mm |
| US 8 | 257 mm | US 8 | 97% | -0.2 mm |
| US 8.5 | 260 mm | US 8.5 | 97% | -0.2 mm |
| US 9 | 267 mm | US 9 | 97% | -0.2 mm |
| US 9.5 | 270 mm | US 9.5 | 97% | -0.2 mm |
| US 10 | 273 mm | US 10 | 97% | -0.2 mm |
| US 10.5 | 277 mm | US 10.5 | 97% | -0.2 mm |
| US 11 | 280 mm | US 11 | 97% | -0.2 mm |
Related Comparisons
Frequently Asked Questions
How does the Kacy Loafer size compare to the Tia Platform?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Kacy Loafer has an internal fit offset of 0.12mm compared to -0.12mm for the Tia Platform.
Do these shoes fit wide feet comfortably?
The Kacy Loafer has a roomy/wide width profile, while the Tia Platform is snug/narrow.