This is the first style of Croc I ever bought....10 years ago.  I have at least 6 identical pair.  This last pair feels at least  a 1/2 size larger.  My feet aren't shrinking.  These just are just big enough to be clumsy.  Going to give them to my friend whose feet are a smudge bigger than mine.  I'll order down a size and see what happens.  All of that said, these are my favorite shoes in the world and if it didn't get so far below zero here in the winter, I'd wear them year round!