Didn't know at first
I got these boots (and another pair) last night and I tried them on right away without socks on. I couldn't get them on my feet. I was so frustrated. This morning I was determined to get them on and I put on some thin socks and the boots slid right on my feet. As I've worn them around the house, they have loosened up some too and they have become more formed to my foot shape. I love them! The look of them is great and they are comfortable. I don't usually wear a heal, but with the height in the front, it doesn't seem like a heal at all. I would highly recommend them. My feet aren't fat, but if you do have thick feet, the next size up is what you should order or they will be difficult to get on.