I liked the pictures online, read the reviews and was concerned about the size. I wear Men's Nike 11, Men's Sperry 11 and ordered a size 11 here without thinking haha. But on my foot they fit perfectly. Literally like a glove so I can see some people get in trouble. There is a size chart on the packaging for future Puma purchases which I will definitely use. In addition, the memory foam is very comfortable. These are wonderful shoes! Looking at the tags, I noticed that my Nike men's 11 is EU size 45. This R78 men's 11 EU size 44.5 which would give me 11.5 with the switch at Puma. So order half a size bigger, as everyone says!