I have a very small foot and could always buy children's shoe sizes. I had an old pair of Converse that fit perfectly and they were a size 3 so I ordered the same size as the ones that thought they would also fit perfectly. When they arrived and I tried them on they were larger than the regular size 3 I'm used to. Not sure if they resized or not but I could probably order a 2 or 2.5 for a better fit. Otherwise they are excellent quality as always and I still love them!