If I could give a zero star review I would!  The thong on these shoes is ridiculously tight.  I ordered these and two other pairs of Croc sandals in an 11.  The other shoes fit fine but these were unwearable.  I had someone who wears a size 9 try them on and even she was not able to wear them comfortably due to the tightness of the thong!  It's unfortunate because the arch support on this show is fantastic and the sole is one of the most comfortable I've ever felt, but the thong makes them impossible to wear for any length of time.  What a shame!