I'm a flat, 9.5 narrow, which can be hard to fit. After ordering the Ortega (good fit for me, plus extra room on top of the foot, which is normal for my flat feet) and the Clay (sadly, way too wide & a bit too short), these are true to size if you wear a thin sock. They might also stretch a bit. If you like very thick socks or wear insoles, size up a 1/2 size. I've got a very narrow foot and find these to be exactly my toebox width, which means that others may need time to stretch them out a bit...