Simple and sophisticated black loafers. - Brand: Camper - Color: Black - Style: Loafers - Design: Slip-on Thank you for viewing. According to the manufacturer's website, size 40 is 25.5cm, but I usually wear sneakers in sizes 26 to 26.5 cm. I tried the size on at a department store, and it felt close to 26 cm, but if you are concerned, I recommend going to a store to try them on. I haven't worn them in a while, and upon checking now, the top of the right insole has come slightly unglued. Despite this condition, please consider them if you are interested.