I was so excited to finally purchase a pair of Dansko's but I've tried on clogs before and they always seem to run small.  Given that information I went ahead and ordered a size larger than I normally would have.  I wear a standard size 10 in US Women's shoes, I ordered a size 11.5 US (42 EU) in these and there is no way they are this size.  I also have several pairs of Birkenstock shoes at size 41 that are longer than these.  I wondered if perhaps they sent the wrong size in the box, but it is stamped quite clearly on the bottom of the shoe size 42 EU.  It simply is not possible for me to fit my smaller foot (my left foot is smaller by about half a size) into these shoes.  I am so disappointed as I really was looking forward to having my first pair of Dansko shoes that I'd heard so many great recommendations on.  It is my opinion that at the larger sizes these shoes run very small. I think perhaps one size larger may fit, however I still haven't decided if I'm going to try a larger size.  If I do, I will update my review with how that turns out.