As a student teacher these clogs have saved my aching feet!  They are well made and comfy. When I first purchased I ordered my usual size (41 /US size 10) and had an odd experience.  The left shoe fit a little snug, but I couldn't even get the right one on!  From the outside they seemed to be the same size (and were the correct sized listed) but one was definitely smaller than the other.  Still wanting to give them a shot I exchanged for one size larger and the replacements were perfect.  I read a few other reviews expressing that others have also had this problem.  I did notice that the second pair seemed to be in a more "updated" box so perhaps they are working on it?  Over all great shoe and a speedy exchange.  Hope to purchase a second pair!