I don't know what happened.  I've bought Crocs from Amazon before and have been very happy, but not this time.  I ordered a pair of 10/12 unisex crocs from Ultimate Shoe Zone for my husband and they were significantly undersized even though they say they are the same size and model as he currently has.  Not only are they way too small but they are warped around the heel area.  We will have to return them since they don't come close to fitting.