True-to-Size Millimeter Sizing Comparison
Brooks Addiction GTS 15 vs Brooks Addiction Walker 2
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 Addiction GTS 15 to see your calculated size in the Addiction Walker 2.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Addiction GTS 15 (US) | Internal Cavity | Addiction Walker 2 Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 4.5 | 232 mm | US 4.5 | 100% | -0.0 mm |
| US 5 | 236 mm | US 5 | 100% | -0.0 mm |
| US 5.5 | 239 mm | US 5.5 | 100% | -0.0 mm |
| US 6 | 242 mm | US 6 | 100% | -0.0 mm |
| US 6.5 | 246 mm | US 6.5 | 100% | -0.0 mm |
| US 7 | 249 mm | US 7 | 100% | -0.0 mm |
| US 7.5 | 252 mm | US 7.5 | 100% | -0.0 mm |
| US 8 | 256 mm | US 8 | 100% | -0.0 mm |
| US 8.5 | 259 mm | US 8.5 | 100% | -0.0 mm |
| US 9 | 266 mm | US 9 | 100% | -0.0 mm |
| US 9.5 | 269 mm | US 9.5 | 100% | -0.0 mm |
| US 10 | 272 mm | US 10 | 100% | -0.0 mm |
| US 10.5 | 276 mm | US 10.5 | 100% | -0.0 mm |
| US 11 | 279 mm | US 11 | 100% | -0.0 mm |
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Frequently Asked Questions
How does the Addiction GTS 15 size compare to the Addiction Walker 2?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Addiction GTS 15 has an internal fit offset of -0.84mm compared to -0.88mm for the Addiction Walker 2.
Do these shoes fit wide feet comfortably?
The Addiction GTS 15 has a snug/narrow width profile, while the Addiction Walker 2 is snug/narrow.