After reading the comments of other buyers, I ordered a size 37.5 shoe size when I 36.5 The box has a sticker EUR 37.5 but the label inside the shoe is marked EUR 38.5 Go figure ???? In use, they are really perfect. I bought them to make Zumba and I feel much better with sneakers. Easier to rotate the foot. They are flexible and lightweight. Also perfectly suited for the practice of dance as they pound into two thanks to the sole in 2 parts.