I was looking for over-the-knee boots when I found these on Amazon and fell in love with the multi-buckle design.  I did as others suggested and ordered a half size up from my normal shoe size, and they fit nicely.  They do run narrow, especially in the toe area, but a half-size up was perfect for me.  Also, they are leather, so they will stretch a bit and form fit to your legs and feet.  I was just the tiniest bit sad that they aren't technically over MY knee.  I have very long lower legs, so they hit right at the kneecap on me.  I would suggest measuring if you're particular about where you want these to come up to on your leg.  Also, there is NO arch support in these boots - the insides are completely flat, so a pair of gel inserts fixed that problem quickly.  I get SO many compliments on these boots!  My only regret is that I didn't get both the brown AND the black!