I usually get a size 9 but decided to get a 9 1/2 based on the fit of my last pair of Nike shoes(Air Max Tailwind).  I think the width on these is a bit narrow.  I have worn them all day 4 or 5 times now and have a couple of spots that are bothering my feet, small toe both feet and a little bothersome just below the big toe on the side.  I've never had to order extra wide before but I'm beginning to think that I may have to in the future.  Hopefully they'll stretch out some.  I don't know if my feet are spreading due to getting older or shoes are shrinking.  Maybe its time to go into a store and get fitted for the next pair.