I have one pair of Emmie flats that I LOVE and wear every day.  They are suede and required very little breaking time.  Since that pair, I have purchased and returned about 3 additional pairs, and kept one additional pair (velvet) which I hate and could never fully break in.  The sizing varies wildly among the colors. I ordered my normal size in my first suede pair, but in the velvet I had to exchange several times until I was a FULL size above normal and expected them to relax a little bit with time.  Months later and they are still too short and I avoid wearing them unless I have absolutely no other shoes that match my outfit.  This particular pair (travertine silver) I ordered a size up initially and they were still uncomfortable and felt too short.  I don't recommend these unless you have the time to go through several iterations of exchanges.  One other thing - they do NOT breathe.