Shown with a cast-on count of 23 stitches.  

• Row 1 (RS): K2tog, yo, k2tog, yo, p3, yo, ssk, yo, ssk, k1, k2tog, yo, k2tog, yo, p3, yo, ssk, yo, ssk.
• Rows 2 and 4: P4, k3, p9, k3, p4.
• Row 3: K1, k2tog, yo, k1, p3, k1, yo, ssk, yo, sl1-k2tog-psso, yo, k2tog, yo, k1, p3, k1, yo, ssk, k1.
• Row 5: K2tog, yo, k2tog, yo, p1, k1, p1, yo, ssk, yo, ssk, k1, k2tog, yo, k2tog, yo, p1, k1, p1, yo, ssk, yo, ssk.
• Row 6: P4, k1, p1, k1, p9, k1, p1, k1, p4.
• Row 7: K1, k2tog, yo, k5, yo, ssk, yo, sl1-k2tog-psso, yo, k2tog, yo, k5, yo, ssk, k1.
• Rows 8, 10, 14, 16, 18, 20, and 22: P23.
• Row 9: K2tog, yo, k7, yo, ssk, k1, k2tog, yo, k7, yo, ssk.
• Row 11: K1, yo, k9, yo, sl1-k2tog-psso, yo, k9, yo, k1 (25 sts).
• Row 12: P25.
• Row 13: K1, ssk, k7, k2tog, yo, k1, yo, ssk, k7, k2tog, k1 (23 sts).
• Row 15: K1, yo, ssk, k5, k2tog, yo, k3, yo, ssk, k5, k2tog, yo, k1.
• Row 17: K2, yo, ssk, k3, k2tog, yo, k5, yo, ssk, k3, k2tog, yo, k2.
• Row 19: K3, yo, ssk, k1, k2tog, yo, k7, yo, ssk, k1, k2tog, yo, k3.
• Row 21: K4, yo, sl1-k2tog-psso, yo, k9, yo, sl1-k2tog-psso, yo, k4.
• Rows 23, 25, and 27: Ssk, k3, yo, k1, yo, k3, k2tog, p1, ssk, k3, yo, k1, yo, k3, k2tog.
• Rows 24, 26, and 28: P11, k1, p11.