I thought long and hard about sizing.  I am 7US, and have a pair of ballet flat Campers in 7US, so despite reviews, ordered the 7. Other reviewers were right, the sizing is a bit small.  For me, tight around the top of the foot, but not in length. I wore them around the house for days and then finally wore them outside wearing nylons only.  The fit is fine with nylons, but I doubt I will be able to wear socks (however thin) with these boots.  Oh well, I got them on sale and they are cute and comfortable with nylons.