21, with the row row row in the round (copy) debug

Shown with a cast-on count of 20 stitches.   Getting chart...

  • Row 1 (RS): P4, yo, p4, yo, p4, p2tog tbl, p4, p2tog tbl.
  • Row 2: K1, k2tog, yo, k3, ssk, yo, k8, yo, ssk, k2.
  • Row 3: K2, k1 tbl, yo, ssk, k2, k2tog, yo, k1 tbl, k2, k1 tbl, k2, k1 tbl, yo, ssk, k1 tbl, k1.
  • Row 4: K1 tbl, k2, k1 tbl, yo, ssk, k1 tbl, k2, k1 tbl, yo, k3tog, yo, k2 tbl, yo, ssk, k1 tbl, k2.
  • Row 5: K4, k1 tbl, yo, k1 tbl, yo, k5 tbl, k3tog tbl, k3, k2 tbl, k1 tbl.
  • Row 6: K1 tbl, k3, k1 tbl, yo, ssk, k2, k1 tbl, k1, k1 tbl, yo, ssk, k1 tbl, k3, k2 tbl.
  • Row 7: K2 tbl, yo, ssk, k3, k1 tbl, yo, ssk, k3, k2 tbl, yo, sl1-k2tog-psso, yo, k1 tbl, k1.
  • Row 8: K4, yo, k2tog, yo, sl2-k1-p2sso, yo, ssk, yo, k1, k2tog, yo, k1 tbl, yo, sl1-k2tog-psso, yo, k2 tbl.
  • Row 9: K2 tbl, k2, yo, ssk, k2, k2tog, yo, k1, yo, ssk, k2, yo, k2tog, yo, k2tog tbl, k1.
  • Row 10: Sl1 wyif, p4 tbl, p2, p2 tbl, p11.
  • Row 11: K1, ssk, yo, k1 tbl, ssk, yo, k1 tbl, ssk, yo, k4, k1 tbl, k1, yo, k2tog tbl, k1 tbl, yo, ssk.