Between sizes? Start from the model’s length verdict, then adjust for width and socks. A half size is not a universal rule — AF1 half-down is not Samba half-up.
Use the row that matches the model’s length verdict, then apply the width/socks note. Shop links stay on each model page (Amazon tag whatsizetobuy-20).
| If the model | Between sizes, try | Unless |
|---|---|---|
| Runs big (Gazelle, AF1, Chuck 70, Wallabee, 990v6 D, Iron Ranger) | Half size down from your sneaker US | Wide feet — stay TTS or go wide (2E) instead of lengthening |
| Runs small (Cloud 5, Cortez, 350 V2, D’Lites, Newport H2) | Half size up | Race lockdown on Speedcross — TTS or half down only if you already know the last |
| Runs small + whole-size jumps (Yeezy Slides) | +1 US as the default | Narrow barefoot can try TTS; thick socks / wide +1 to +2 |
| Boots that run big vs sneakers (1460, Timberland 6-Inch, Caribou, Captain) | Half down (full down if the note says so) | Thick winter socks — stay closer to TTS |