Contrary to some other reviews, I actually went up half a size (so my same size as Frye boots) after an easy return/exchange w/ Amazon.  So happy I got these shoes.  They are cute and are seriously the most comfortable ballet flats ever.  No toe smushing, no elastic band cutting into the back of your heel/achilles area.  I got one of the sparkly colors, and am seriously considering a more practical pair as well.  Amazon price on the ones I got was better than at other sites.