Shown with a cast-on count of 23 stitches.  

• Row 1 (RS): Yo, k2tog, k2, k2tog, yo, k3, k2tog, yo, k1, k2tog, yo, ssk, k2tog, yo, k2tog, yo, k2tog, k1 (21 sts).
• Row 2: K2, yo, k2tog, yo, k3, (k1, p1) in next st, k2tog, yo, k3, k2tog, yo, k1, yo, ssk, k3 (23 sts).
• Row 3: Yo, k2tog, k2tog, yo, k3, yo, k2tog, k3, yo, ssk, k2tog, yo, k2tog, k1, yo, k2tog, yo, k2.
• Row 4: K2, yo, k2tog, yo, k3, (k1, p1) in next st, k2tog, yo, k6, yo, sl1-k2tog-psso, yo, k4 (25 sts).
• Row 5: Yo, k2tog, k2, k2tog, yo, k5, k2tog, yo, k1, yo, ssk, k2tog, yo, ssk, k1, yo, k2tog, yo, k2.
• Row 6: K2, yo, k2tog, yo, k3, (k1, p1) in next st, k2tog, yo, k3, yo, ssk, k2, k2tog, yo, k1, yo, ssk, k3 (27 sts).
• Row 7: Yo, k2tog, k2tog, yo, k3, yo, k2tog, ssk, yo, k5, yo, ssk, k2tog, yo, ssk, k1, yo, k2tog, yo, k2.
• Row 8: K1, ssk, yo, ssk, yo, ssk, (k1, p1) in next st, k3, yo, ssk, k1, k2tog, yo, k4, yo, sl1-k2tog-psso, yo, k4.
• Row 9: Yo, k2tog, k2, k2tog, yo, k6, yo, sl1-k2tog-psso, yo, k1, k2tog, yo, ssk, k2tog, yo, k2tog, yo, k2tog, k1 (25 sts).
• Row 10: K1, ssk, yo, ssk, yo, ssk, (k1, p1) in next st, k3, yo, ssk, k4, k2tog, yo, k1, yo, ssk, k3.
• Row 11: Yo, k2tog, k2tog, yo, k3, yo, ssk, k2, k2tog, yo, k1, k2tog, yo, ssk, k2tog, yo, k2tog, yo, k2tog, k1 (23 sts).
• Row 12: K1, ssk, yo, ssk, yo, ssk, (k1, p1) in next st, k3, yo, ssk, k3, yo, sl1-k2tog-psso, yo, k4.