True-to-Size Millimeter Sizing Comparison
Taft Jack Oxford Dress vs Taft Preston
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 Jack Oxford Dress to see your calculated size in the Preston.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Jack Oxford Dress (US) | Internal Cavity | Preston Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 3.5 | 236 mm | US 3.5 | 54% | +3.9 mm |
| US 4 | 239 mm | US 3.5 | 89% | +0.9 mm |
| US 4.5 | 243 mm | US 4 | 99% | -0.1 mm |
| US 5 | 246 mm | US 4.5 | 89% | +0.9 mm |
| US 5.5 | 249 mm | US 5 | 89% | +0.9 mm |
| US 6 | 253 mm | US 5.5 | 99% | -0.1 mm |
| US 6.5 | 256 mm | US 6 | 89% | +0.9 mm |
| US 7 | 263 mm | US 7 | 54% | +3.9 mm |
| US 7.5 | 266 mm | US 7 | 89% | +0.9 mm |
| US 8 | 269 mm | US 7.5 | 89% | +0.9 mm |
| US 8.5 | 273 mm | US 8 | 99% | -0.1 mm |
| US 9 | 276 mm | US 8.5 | 89% | +0.9 mm |
| US 9.5 | 279 mm | US 9 | 89% | +0.9 mm |
| US 10 | 283 mm | US 9.5 | 99% | -0.1 mm |
| US 10.5 | 286 mm | US 10 | 89% | +0.9 mm |
| US 11 | 289 mm | US 10.5 | 89% | +0.9 mm |
| US 11.5 | 293 mm | US 11 | 99% | -0.1 mm |
| US 12 | 296 mm | US 11.5 | 89% | +0.9 mm |
| US 12.5 | 299 mm | US 12 | 89% | +0.9 mm |
| US 13 | 303 mm | US 12.5 | 99% | -0.1 mm |
| US 14 | 309 mm | US 14 | 54% | +3.9 mm |
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Frequently Asked Questions
How does the Jack Oxford Dress size compare to the Preston?
The Preston provides about 4mm more internal length than the Jack Oxford Dress. We suggest ordering 1/2 size down in Preston. The Jack Oxford Dress has an internal fit offset of -3.92mm compared to 0mm for the Preston.
Do these shoes fit wide feet comfortably?
The Jack Oxford Dress has a snug/narrow width profile, while the Preston is snug/narrow.