Biberschwanz, beaver tail, is the name of the tiles on the roofs of half-timbered Alsatian houses. The design of these socks reminds me of those tiles.

These socks feature slipped stitches and twisted stitches.
They are worked from the top down with a heel flap and gusset. Only one color is used per round and colors are alternated for each round, making the color work very easy.

Yarns
Main color, MC: 180-260 m (200-285 yards) in solid.
Contrasting color, CC: 120-160 m (130-175 yards) in solid, semi-solid or gradient.

Sizes: Small: European 37-38. Medium: European 39-41. Large: European 42-44.
Foot circumference: 18-20 (20-23, 23-26) cm 7-8 (8-9, 9-10) inches.

Notions: tapestry needle, stitch markers.