Shown with a cast-on count of 21 stitches.  

• Row 1 (RS): Yo, k1, yo, k2tog, yo, k1, yo, k2tog, yo, k2tog, k1, k2tog, yo, k1, yo, k2tog, k3, yo, k2tog, k2 (23 sts).
• Row 2: K2, yo, k2tog, k2, k2tog, yo, k3, yo, sl1-k2tog-psso, yo, k2tog, yo, k3, yo, k2tog, yo, k2tog.
• Row 3: Yo, k1, yo, k2tog, yo, k5, yo, k2tog, yo, k2tog, k4, yo, k2tog, k1, yo, k2tog, k2 (25 sts).
• Row 4: K2, yo, k2tog, k3, yo, k2tog, k1, k2tog, yo, k2tog, yo, k1, yo, k2tog, k1, k2tog, yo, k1, yo, k2tog, yo, k2tog.
• Row 5: Yo, k1, yo, k2tog, yo, k3, yo, sl1-k2tog-psso, yo, k3, yo, k2tog, yo, sl1-k2tog-psso, yo, k4, yo, k2tog, k2 (27 sts).
• Row 6: K2, yo, k2tog, k6, k2tog, yo, k11, yo, k2tog, yo, k2tog.
• Row 7: Yo, k2tog, yo, k2tog, yo, k2tog, k1, k2tog, yo, k1, yo, k2tog, k1, k2tog, yo, k2tog, yo, k1, yo, k2tog, k3, yo, k2tog, k2.
• Row 8: K2, yo, k2tog, k2, k2tog, yo, k3, yo, k2tog, yo, sl1-k2tog-psso, yo, k3, yo, sl1-k2tog-psso, yo, k2tog, yo, sl1-k2tog-psso (25 sts).
• Row 9: Yo, k2tog, yo, k2tog, yo, k2tog, k3, k2tog, yo, k2tog, yo, k5, yo, k2tog, k1, yo, k2tog, k2.
• Row 10: K2, yo, k2tog, k3, yo, k2tog, k1, k2tog, yo, k1, yo, k2tog, yo, k2tog, k1, k2tog, yo, k2tog, yo, sl1-k2tog-psso (23 sts).
• Row 11: Yo, k2tog, yo, k2tog, yo, sl1-k2tog-psso, yo, k2tog, k3, yo, sl1-k2tog-psso, yo, k4, yo, k2tog, k2 (22 sts).
• Row 12: K2, yo, k2tog, k11, yo, k2tog, k1, k2tog, yo, k2tog (21 sts).