I'm not exactly of supermodel slimness, but for 5'7", I do have normally proportioned calves. These fit me perfectly at the feet, but I couldn't actually get them to fit properly (or even lace all the way up) because they don't fit around the upper part of my calves. Instead, I've just laced them to the top hook and tied them off there. No biggie, and it looks intentional.On the plus side, they look amazing. I have them now in black patent, and just ordered the black PU. They are incredibly comfortable, and I've been wearing them for hours with no issues. The platform sole and the wide heel make them stable and easy to walk in, they have great ankle support, and the biggest surprise is how light they are. I typically wear boots with a chunky heel like these, and find that by the end of the day my calves are exhausted from the weight, but these are incredibly light yet the heels don't feel hollow or weak.