I'm in my 60s and have lived my life wearing socks that were too small. What a treat to now start seeing socks in large sizes for women's shoe size 10 and above (I wear an 11). I love the fit, and they do NOT creep down my heel and under my foot while wearing, as one-size-fits-small no-shows do. Unfortunately, these come up just a bit too far on my instep and show in the loafers I intended to wear them with. So now I am wearing them in my walking shoes instead.This is the first pair of socks that haven’t slid off of my feet at all ( size 11)! I am thrilled with them! I will be sure to order a few more pair over time, as they are a bit pricey.A friend ordered these and raved about them, I ordered them, yet they are too big.It recommended a large and that was incorrect.I will be returning and wills try the smaller size.The band is very secureFantastic for covering your feet. They do not shift much during wear.They are wonderful. They do not slip off your feet.They stay on all day.By far the best no-show non-slip socks I’ve come across.I wear a mens size 10.5-11 and got the Large. Perfect fit. They do stretch a bit so I’m sure it could fit a 12 size just fine. Great find after many attempts ?I think if the socks were just a bit thicker, they'd be more comfortable.