Flat knit chart: 144 needles wide, 400 rows. Magenta is the marl heel and toe yarn.
Change the sock colour and each pattern colour of any design, and the 3D sock updates at once. To see your own design, save the chart as BMP or PNG (144 wide, up to 400 tall) and upload it. The top-left colour of the chart is treated as the empty (no-stitch) grey.