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
Guide to the adidas Yeezy Boost 350: Sizing, Care, and Popular Colorways - Stadium Goods Journal
Yeezy Size Chart: The Ultimate Guide - Novelship News
Size Chart - Yeezy Kids a Infant - BBNSUPPLY
Yeezy Foam RNNR Sizing: How Do They Fit? | The Sole Supplier