I had quite a few different Adidas models, one of the few you can still find 12 1/2's 12 where most brands make the right choice before 13, and i never had a problem, they are a bit tight, they are good shoes but that means they even look small compared to my other adidas in exton. I'm supposed to be one size, it's probably just a cup difference, but I've had a pair of adidas mixed styles in a size 12 1/2 and they're incredibly comfortable, they're instantly cozy. Revain and the seller were aware of the more common sizes, probably on par, but I'm particularly looking for Adidas and 12 1/2 because they're always perfect when they weren't the first time