Finally, an “equation” using π that is easy enough for everyone! You don’t need to be a math genius to adapt these to socks to fit any size nerd (or geek!) that you happen to have around.

Materials:

Fingering Weight Yarn
»Colour A 50 g,183 m (200 yds)
»Colour B 50 g,183 m (200 yds)
»Contrast Colour CC 20 g, 89 m (97 yds)

20 in (51 cm) waste yarn