SKECHERS Summits High Range Hands Free Slip-Ins vs SKECHERS Ultra Flex 3.0 Smooth Step Hands Free Slip-Ins
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 Summits High Range Hands Free Slip-Ins to see your calculated size in the Ultra Flex 3.0 Smooth Step Hands Free Slip-Ins.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Summits High Range Hands Free Slip-Ins (US) | Internal Cavity | Ultra Flex 3.0 Smooth Step Hands Free Slip-Ins Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 6.5 | 261 mm | US 6.5 | 96% | +0.3 mm |
| US 7 | 266 mm | US 7 | 96% | +0.3 mm |
| US 7.5 | 271 mm | US 7.5 | 96% | +0.3 mm |
| US 8 | 276 mm | US 8 | 96% | +0.3 mm |
| US 8.5 | 281 mm | US 8.5 | 96% | +0.3 mm |
| US 9 | 286 mm | US 9 | 96% | +0.3 mm |
| US 9.5 | 291 mm | US 9.5 | 96% | +0.3 mm |
| US 10 | 296 mm | US 10 | 96% | +0.3 mm |
| US 10.5 | 301 mm | US 10.5 | 96% | +0.3 mm |
| US 11 | 306 mm | US 11 | 96% | +0.3 mm |
| US 11.5 | 311 mm | US 11.5 | 96% | +0.3 mm |
| US 12 | 316 mm | US 12 | 96% | +0.3 mm |
| US 12.5 | 321 mm | US 12.5 | 96% | +0.3 mm |
| US 13 | 326 mm | US 13 | 96% | +0.3 mm |
| US 13.5 | 331 mm | US 13.5 | 96% | +0.3 mm |
| US 14 | 336 mm | US 14 | 96% | +0.3 mm |
| US 15 | 346 mm | US 15 | 96% | +0.3 mm |
| US 16 | 356 mm | US 16 | 96% | +0.3 mm |
Related Comparisons
Frequently Asked Questions
How does the Summits High Range Hands Free Slip-Ins size compare to the Ultra Flex 3.0 Smooth Step Hands Free Slip-Ins?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Summits High Range Hands Free Slip-Ins has an internal fit offset of -0.08mm compared to 0.24mm for the Ultra Flex 3.0 Smooth Step Hands Free Slip-Ins.
Do these shoes fit wide feet comfortably?
The Summits High Range Hands Free Slip-Ins has a roomy/wide width profile, while the Ultra Flex 3.0 Smooth Step Hands Free Slip-Ins is snug/narrow.