True-to-Size Millimeter Sizing Comparison
Eastland 1955 Edition Classic II vs Eastland 1955 Edition Sadie
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 Classic II to see your calculated size in the Sadie.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Classic II (US) | Internal Cavity | Sadie Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 4.5 | 233 mm | US 3.5 | 22% | +6.6 mm |
| US 5 | 237 mm | US 3.5 | 69% | +2.6 mm |
| US 5.5 | 240 mm | US 4 | 69% | +2.6 mm |
| US 6 | 243 mm | US 4 | 96% | -0.4 mm |
| US 6.5 | 247 mm | US 5 | 69% | +2.6 mm |
| US 7 | 250 mm | US 5.5 | 69% | +2.6 mm |
| US 7.5 | 253 mm | US 5.5 | 96% | -0.4 mm |
| US 8 | 257 mm | US 6.5 | 69% | +2.6 mm |
| US 8.5 | 260 mm | US 6.5 | 96% | -0.4 mm |
| US 9 | 267 mm | US 7.5 | 69% | +2.6 mm |
| US 9.5 | 270 mm | US 8 | 69% | +2.6 mm |
| US 10 | 273 mm | US 8 | 96% | -0.4 mm |
| US 10.5 | 277 mm | US 9 | 69% | +2.6 mm |
| US 11 | 280 mm | US 9.5 | 69% | +2.6 mm |
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Frequently Asked Questions
How does the Classic II size compare to the Sadie?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Classic II has an internal fit offset of 0.04mm compared to -0.32mm for the Sadie.
Do these shoes fit wide feet comfortably?
The Classic II has a snug/narrow width profile, while the Sadie is snug/narrow.