(worked over 6 sts)
Rows 1, 3 and 11 (RS) K2, p2, k2.
Rows 2 and 4 P2, k2, p2.
Rows 5 and 9 Sl 3 sts to cn and hold to back, k3, k3 from cn..
Rows 6, 8 and 10 Purl.
Row 7 Knit.
Row 12 Rep row 2.
Rep rows 1–12.
Note: this is a generic pattern for creating this cable. For a single cable it would be 6 stitches. In the example shown, there is one repeat of the stitch with 12 stitches are on either side, so you'd need to cast on 30 (12 + 6 + 12) stitches and knit 12 stitches before and after the pattern.
Stitch directions reproduced with permission, from Vogue Knitting Stitchionary: Volume Two, Sixth & Spring Books, 2005