I ordered a size 12 which is the same size I have worn in CH shoes for years including a previous pair of similar driver style loafers where I have replaced the soles since I got them and they seemed very tight. I thought it might just be leather to wear but I grabbed a pair of old size 12 loafers and compared the sole and the sole was hard on them. 0.25 cm narrower. When I saw that the soles of the previous pair no longer reached the edges of my feet, I sent them back and ordered the 12th size. However, the leather and styling are premium, as I would expect. .