Although this sock is intended to fit up to size 10, it doesn't.  I wear a size 9.5 shoe, and it's too small for me, so the socks work their way off my heels and under my foot.  Other brands are more expensive and don't have this problem.  The band at the top is also not holding up well.  These were the worst of the three brands of socks I purchased.  My favorite is the "Thorlo Women's Health Padds Moderate Padded Diabetic Low Cut Socks".  They are expensive, but by far my favorite and well worth the price.  I've ordered more of the Thorlo's!