Shown with a cast-on count of 18 stitches.  

• Rows 1, 3, and 5 (WS): P18.
• Row 2: [K2tog] 3 times, [yo, k1] 3 times, [k1, yo] 3 times, [k2tog] 3 times.
• Row 4: K18.
• Row 6: [K2tog] twice, k1, [k1, yo] 3 times, k2tog, [yo, k1] 3 times, k1, [k2tog] twice (19 sts).
• Rows 7 and 9: P19.
• Row 8: K19.
• Row 10: K2tog, k2tog, k2tog, yo, k1, yo, k1, yo, k1, yo, k1, yo, k1, yo, k1, yo, k1, yo, k2tog, k2tog, k2tog (21 sts).
• Rows 11 and 13: P21.
• Row 12: K21.
• Row 14: K3tog, k3tog, [yo, k1] 9 times, yo, k3tog, k3tog (23 sts).
• Rows 15, 17, 19, and 21: P23.
• Rows 16 and 20: K23.
• Row 18: K3tog, k3tog, yo, k2tog, [yo, k1] 7 times, yo, k2tog, yo, k3tog, k3tog.
• Row 22: K3tog, k2tog, k2tog, [yo, k1] 9 times, yo, k2tog, k2tog, k3tog (25 sts).
• Rows 23, 25, and 27: P25.
• Row 24: K25.
• Row 26: K3tog, k3tog, k2tog, [yo, k1] 9 times, yo, k2tog, k3tog, k3tog.
• Row 28: K2tog, k2tog, [yo, k2tog] 3 times, [yo, k1] 5 times, yo, [k2tog, yo] 3 times, k2tog, k2tog (27 sts).
• Row 29: P27.