Purchased in the Very Purple/Black/Light Onyx in a 9M.  I am a solid 9.5M in dress shoes and Asics (often a 10M in Nike), but had tried these on in a local store so knew to size down to a 9M.  I am not a runner, but will use these for walking and around town.  Very lightweight, comfy, and super fun colors. The arch is slightly high for my taste; I imagine this would be a problem for runners that have a normal to low arch.  Great price at nearly 50% off suggested retail.