I have a foot size 13- 131/2. Med width. Most socks you see advertised say fits all, say 11=13 Or different sizes. Simulator , And are to tight in the foot size but plenty tall and tight. Just started warring and seem good so if you have a 13-14 size medium weight material it is true to size for a change. The size chart is a bit puzzling, but if you were a 15 shoe. Med. you might like also. People have larger feet now a days but most manufacturers only go to 12.