I wear an 8.5-9 ladies shoe and ordered the large socks as recommended. I'm 5'7" and am a bit overweight (160#). These socks are too big - extra large foot, has about an inch extra space in the heel and are too long - maybe an extra 1.5 inches in length and really aren't compressing much. I wear compression socks to help with an ankle injury, these don't really offer the degree of compression I expected for the number. They are also very thin, not fragile, but I expect they won't last long. I'd hoped to save the price of buying Sockwell compression socks. Not with these. If I hadn't washed them trying to shrink them, I'd return them.