I usually wear a 10 but got an 11 bc 10 was sold out. I was going to use toe cushions for the extra space in the boot but surprisingly the 11 fit perfect. I don’t have wide feet so I was genuinely surprised. so I say you can get away with a size up and make it work with thick socks or toe cushions. They are truly thigh highs. I am 5’9 and they hit mid thigh for me and I have thick thighs. 196lbs. Tall girls get them!