General consensus on Flyknits=normal Nike size or 1/2 size up? Just got mine and feel much snugger at toe than i expected. Not sure if better to size up or just leave it...not really planning to use as a true runner.
I go with my normal size for Lunars and Trainers and size up a half for Frees. Not sure about Racers. If you're not running in them and they aren't uncomfortable you should be fine. I actually size down a half sometimes for non-performance Nikes like the Flyknit chukkas or performance shoes that I want to wear casually only, since I like the closer fit/slightly shorter look. Edited by ChetB - 10/29/13 at 9:28pm
i go up a half size in the lunar one, because i like having a little more breathing room, but it all depends on your feet and what socks you'll be wearing with them. try on both sizes if you can, and just pick the one that feels best off the bat