True-to-Size Millimeter Sizing Comparison
UGG Ansley vs UGG Bailey Bow II
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 Ansley to see your calculated size in the Bailey Bow II.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Ansley (US) | Internal Cavity | Bailey Bow II Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 4.5 | 229 mm | US 3.5 | 0% | +11.0 mm |
| US 5 | 233 mm | US 3.5 | 17% | +7.0 mm |
| US 5.5 | 236 mm | US 3.5 | 53% | +4.0 mm |
| US 6 | 239 mm | US 3.5 | 88% | +1.0 mm |
| US 6.5 | 243 mm | US 4 | 100% | 0.0 mm |
| US 7 | 246 mm | US 4.5 | 88% | +1.0 mm |
| US 7.5 | 249 mm | US 5 | 88% | +1.0 mm |
| US 8 | 253 mm | US 5.5 | 100% | 0.0 mm |
| US 8.5 | 256 mm | US 6 | 88% | +1.0 mm |
| US 9 | 263 mm | US 6.5 | 65% | -3.0 mm |
| US 9.5 | 266 mm | US 7 | 88% | +1.0 mm |
| US 10 | 269 mm | US 7.5 | 88% | +1.0 mm |
| US 10.5 | 273 mm | US 8 | 100% | 0.0 mm |
| US 11 | 276 mm | US 8.5 | 88% | +1.0 mm |
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Frequently Asked Questions
How does the Ansley size compare to the Bailey Bow II?
The Bailey Bow II provides about 4mm more internal length than the Ansley. We suggest ordering 1/2 size down in Bailey Bow II. The Ansley has an internal fit offset of -4mm compared to 0mm for the Bailey Bow II.
Do these shoes fit wide feet comfortably?
The Ansley has a standard medium width profile, while the Bailey Bow II is standard medium.