Stretchy slip stitch

Shown with a cast-on count of 15 stitches.   Getting chart...

  • Row 1 (RS): *K1, p1, k1, p3, repeat from * to last 3 sts, k1, p1, k1.
  • Row 2: *P1, sl1 wyib, p1, k3, repeat from * to last 3 sts, p1, sl1 wyib, p1.
  • Row 3: *K3, p1, k1, p1, repeat from * to last 3 sts, k3.
  • Row 4: *P3, k1, sl1 wyif, k1, repeat from * to last 3 sts, p3.