Simple Slip Stitch
| (multiple of 4 sts plus 3) Row 1 (RS) K1, *sl 1, k3; rep from *, end sl 1, k1. Row 2 Purl. Rep rows 1 and 2. |
Stitch images and directions reproduced with permission, from Vogue Knitting Stitchionary: Volume One, Sixth & Spring Books, 2005