There is no longer any uniformity in Crocs Classics. I have several pairs of Crocs Classics in size 11W/9M which fit fine. I recently ordered two additional pairs in the same size, and they are markedly smaller - close to a full size smaller - though they are marked as 11W/9M. All pairs were made in Mexico, so it is not like different molds in different countries. There is simply no consistency, and my tendency now would be to NOT buy Crocs online from Amazon or any other retailer but to buy them in a store where I can try them on before buying. Very disappointed in Crocs as a company for not maintaining uniformity in molds for a shoe that has been around for many years.