I wear size 10, medium width. I've always worn a size 10, medium width. As I tried on these and all the Lacoste shoes I've ordered, my fingers reached the end and touched them, and the width was so narrow I felt the skin on the balls of my feet wrinkle. These are VERY nice shoes but Lacoste needs to work on converting their EU sizing to US sizing as these shoes were only a 9 or maybe 8 1/2 US.