I bought my normal size 8.5 medium in black..Shoes are very good fit..tight no where and enough room to wiggle my toes. Walked may be more than 10,000 steps since I bought them still no blisters.
These are my second pairs in a year..A year back bought them with different color(nude) and they are still running around. Absolutely love these.
Only problem was that the package was not in a good condition when arrived so I was a bit scared. However shoes were in great condition!