I just received these sandals yesterday and when I first tried them on, I thought they were a bit big, but after wearing them today, they fit perfectly.  I generally wear a 6 in flats and in my Chaco sandals, but I listened to the other reviews and went for a 7 and am so glad that I did.  They are so comfortable and I think I may like them better than my Chacos that I wore all summer long while walking around China.  I highly recommend these sandals, but definitely go a size up.