Purchased my regular size and these sandals are huge.  Very wide with straps that were so big they would not stay on my feet.  As I could not wear them, I immediately sent them back.  I don't think that just going down a size would help.  The foot bed was Okay, it was the straps that were so long, they were not tight enough across the top of my foot to keep the sandal secure.  Also, there is a ridge under the toes that was very high and uncomfortable.  Maybe these were made for men and they just cut them down a little in size for women, without worrying about that really big ridge under the toes.  Not a good sandal.