They come up REALLY small in my opinion. I wear size 12 US in ronix but couldn't get into the 12.5's
So I didn't buy them and have no usage experience
They are good boots, light and well built. Only problem is the base plate and the flexibility of them, they are probably the most flexible boot i have used. halfway through the season i could easily bend them flat onto my board. and the base plate lasts longer than the ronix ones but still they bend after a while