True-to-Size Millimeter Sizing Comparison
Propet TravelActiv Mary Jane vs Propet TravelActiv Slip-On
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 TravelActiv Mary Jane to see your calculated size in the TravelActiv Slip-On.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| TravelActiv Mary Jane (US) | Internal Cavity | TravelActiv Slip-On Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 4.5 | 234 mm | US 3.5 | 15% | +7.2 mm |
| US 5 | 238 mm | US 3.5 | 63% | +3.2 mm |
| US 5.5 | 241 mm | US 3.5 | 98% | +0.2 mm |
| US 6 | 244 mm | US 4 | 98% | +0.2 mm |
| US 6.5 | 248 mm | US 4.5 | 98% | +0.2 mm |
| US 7 | 251 mm | US 5 | 98% | +0.2 mm |
| US 7.5 | 254 mm | US 5.5 | 98% | +0.2 mm |
| US 8 | 258 mm | US 6 | 98% | +0.2 mm |
| US 8.5 | 261 mm | US 6.5 | 98% | +0.2 mm |
| US 9 | 268 mm | US 7 | 98% | +0.2 mm |
| US 9.5 | 271 mm | US 7.5 | 98% | +0.2 mm |
| US 10 | 274 mm | US 8 | 98% | +0.2 mm |
| US 10.5 | 278 mm | US 8.5 | 98% | +0.2 mm |
| US 11 | 281 mm | US 9 | 98% | +0.2 mm |
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Frequently Asked Questions
How does the TravelActiv Mary Jane size compare to the TravelActiv Slip-On?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The TravelActiv Mary Jane has an internal fit offset of 0.52mm compared to 0.68mm for the TravelActiv Slip-On.
Do these shoes fit wide feet comfortably?
The TravelActiv Mary Jane has a roomy/wide width profile, while the TravelActiv Slip-On is roomy/wide.