For 4537, think dress shoe size, as it is designed to be worn with thin socks. It does not have the "Trickers roominess", but rather fits like any other brand of dress shoes would. I think Barrie fits a little large, right, so most people size down .5? I would stay TTS for the 4537, which would be 7.5 UK if you are 8 US - except that if you are an E width that adds another wrinkle.
5/16/14 at 8:05pm