Love these - I have a normal width foot but a size 10 shoe....these actually work and feel great!  Its been so tough to find a no-show sock that wouldn't slip.  I will be buying these again.  I can finally wear sneakers and be comfortable in the sock.  They are nice and thin - which I like - I hate the feel of socks on my feet but I don't feel overwhelmed by these at all.  I would wear flip-flops everyday if PA weather would allow it so I am super picky about socks - these are great!  Buying some more right now.  The socks stay in place when i take my shoe off!