To knit socks using two needles, start by casting 64 stitches and knit until the stocking measures about 7 inches. Then, start working on the instep by counting 32 stitches and knitting until it measures about 4.5 inches. Next, place the remaining 32 stitches on the needle with the back seam at the centre and the right side facing the rejoining yarn. Finish by joining the toe using the three needle cast off. Finally, join the sides and ensure that the seam is as flat as possible, and then sew the centre back seam.