I wear size 39 partly sometimes 40 and bought size 39. I have to say you can wear really thick socks yet. If you have a small 39 I would take the shoe 38. But otherwise it is very comfortable and lightweight, above all. The ideal shoe for still having to take the case. For keinere city tours it is also suitable. For more in my eyes not because too little profile and little maintenance. Would buy the shoes immediately.