I have wide feet and usually wear 81/2 if I cannot find shoes in wide or I wear 8W.  I ordered these in an 8 after reading others' reviews about these running big.  These slip on and off easily.  I am still able to wear a thick wool sock. I don't think they'll be to big this spring/summer when I'm wearing regular socks.  My feet stay dry.  I'm very pleased with this purchase.