I have high arches and these are too small across the top of my foot, even though I ordered a half size up from my normal fit.  After a few wears they are starting to loosen up and can be worn more comfortably, but I definitely ended up with blisters on the top of my foot after the first couple wears.  Despite being tight, they are very comfortable on my feet and I was able to walk in them all day.  Should have taken them to a cobbler to be stretched from day 1.