The official Yeezy Supply page explicitly tells you to order a half size up. Does that mean that's the canon sizing and not just a thing everyone decided to do? : r/yeezys
The Ultimate Yeezy 350 Sizing and Fit Guide - Farfetch
Yeezy Boost 350: A Complete Guide - Fastsole
Yeezy Boost 350 V2 Static Reflective Size 11.5 adidas No Reserve (No Box) – ASA College: Florida