Pattern is for two gauges (Fingering and Sport-weight). Our mothers (and their mothers) knew this sock by heart, with its vertical heel flap, turned heel, picked up gussets and grafted toe. For many of us, it's the first sock we learned and our point of departure into the ever widening world of socks. While we love some of the new approaches, we return again and again to this straightforward, comfy basic. Once you understand its simple structure, improvise to your heart's content.