I am a true 7 1/2 B American size shoe. I wear an 8 in Jimmy Choo. My Chanel flats, beige trimmed in black, are size 38 and fit perfectly. They are the same shoes as in this photo posted by Gigi615, here's the link: http://forum.purseblog.com/attachment.php?attachmentid=228653&d=1186090046 However, I recently tried on a pair of Chanel flats at Bergdorf that I loved but were too tight even in the 38 1/2. Has anyone had this happen to them? They won't stretch since the front and back are patent leather. Has anyone had to go up 3 (half) sizes in a Chanel shoe?