These run extremely wide, and the ordering was hard...I thought I was ordering the right size in womens, turned out to be a full size larger than what I thought.  Once I got the right size, these have made a huge difference in my pain level.  I very bad pronation, which when wearing normal slippers with no support, made my feet hurt at all times.  The crocs made my back and legs hurt the first few days while getting myself back in alignment.  Now they are amazing, and I hate when I have to leave the house and put on "normal" shoes.