(multiple of 8 sts plus 4)
4-st RC Sl 2 sts to cn and hold to back, k2, k2 from cn.
4-st LC Sl 2 sts to cn and hold to front, k2, k2 from cn.
Row 1 (RS) P2, *4-st RC, 4-st LC; rep from * to last 2 sts, p2.
Row 2 and all WS rows K2, p to last 2 sts, k2.
Rows 3 and 7 P2, k to last 2 sts, p2.
Row 5 P2, *4-st LC, 4-st RC; rep from * to last 2 sts, p2.
Row 8 Rep row 2.
Rep rows 1–8.
Note: this is a generic pattern for creating this cable. For a single cable it would be 10 stitches. In the example shown, there are 5 repeats of the stitch, so you'd need to cast on 44 (8 x 5 +4) stitches and do 5 repeats to get a swatch that appears the same.
Stitch directions reproduced with permission, from Vogue Knitting Stitchionary: Volume Two, Sixth & Spring Books, 2005