Sizes run small, but if you move up a size they're worth it
"The size runs small - I'm a 9EE but had to get the XL (11-12) for a comfortable fit. So far they're holding up. I'd love it if the socks had sizes stitched into the toe or the top. Right now I'm having trouble distinguishing the XL socks I bought from the original L I got - until I try to pull them on. The biggest unexpected benefit is that I'm not finding bits of sock between my toes and on my rug anymore. If for no other reason, that's worth the purchase!"
EU