These sneakers are for narrow feet. I bought a size 47 (32 cm across the insole) for a 30 cm foot, but my toes still feel squeezed. The photo shows a comparison with Nike sneakers that are a size smaller. I had to return them. Also, despite the mesh exterior, these shoes aren't suitable for hot weather—they're made of dense, multi-layered fabric and aren't even visible with a flashlight. The tailoring is quite neat, and the sole seems sturdy. I think these would be suitable for someone with narrow feet, but it's still best to go up a size.