I ordered these in a size 5 when my usual size is 6, and the others reviewers were correct, they are big, so the size 5 fit right.  The uncured plastic smell was overwhelming.  I have crocs made in Mexico and others made in China that have no smell.  Something must have gone wrong in the manufacturing process.  The toe post was painful with the synthetic material, so I am going to try the leather ones and see if I have a better result in comfort and smell.