They run a half to a full size too small. The toebox squeezes my metatarsals together along with my toes hit the end of the shoe.  I used to walk every day until I started wearing these.  I now am dealing with Achilles pain and inflammation.
 They are adorable shoes, but they don't give when walking, smoosh my feet so bad I'm still dealing with foot and lower leg pain from wearing these for 2 months. I trust Sketchers but will go to a brick and mortar store and try on my next pair instead of purchasing online.