In this variation of seed stitch, you double seed stitch horizontally and vertically — alternate 2 knits with 2 purls for 2 rows and then reverse the sequence. The following figure shows double seed stitch.
To create the double seed stitch:
Cast on a multiple of 4 sts, plus 2 sts. (Either side can be the right side.)
Rows 1 and 4: K2, * p2, k2; rep from * to end of row.
Rows 2 and 3: P2, * k2, p2; rep from * to end of row.
Rep Rows 1–4 for pattern.