Agree, I sized down to 38 for natural suede and 37.5 for half shearling, both fit perfectly. I am a 38.5 in general, narrow feet with medium arches. The foot beds fit perfectly but there's still a LOT of room for the toes - feels super comfortable once you get used to it but it would be tough to run in themI sized down half a size for the chypre style. Im normally a 39.5 but found that the 39 was a better fit and more secure as these are open toe and heel sandals.