I purchased these as a gift for my partner as his original Crocs are pretty worn out.  These are much more stylish (for clogs) and he really likes the design (someone even complimented him on them when we were shopping at our local BJs).  I was concerned about the size because I ordered an 11 only to realize later that his old pair is labeled as a 10.  I went with the 11 because I have a pair of Croc slides that are a 10 and he wears a larger shoe than me.  He was wearing his old Crocs the time of my order so I wasn't able to check. Fortunately, with Amazon's great return/exchange policy, the risk of getting the wrong size is minimal. Despite the fact that his old Crocs are labeled as a men's 10, he says these fit perfectly.  So, you might want to considering going 1 size larger than usual should you decided to buy these.