Shown with a cast-on count of 40 stitches.  

• Row 1 (RS): K3, yo, k2tog, k1, yo, kfb, yo, k2, ssk, p1, k2tog, k3, yo, k2tog, yo, k2, p1, k2tog, k1, yo, k2tog, yo, k3, yo, k4, [yo, k2tog] twice, yo, k2 (44 sts).
• Row 2: Yo, p2tog, p18, [k1, p9] twice, k4.
• Row 3: K3, yo, k2tog, k1, yo, [kfb] 3 times, yo, k2, ssk, p1, k2tog, k3, yo, k2tog, yo, ssk, p1, k2tog, yo, k2tog, [yo, k5] twice, [yo, k2tog] twice, yo, k2 (49 sts).
• Row 4: Yo, p2tog, p20, k1, p8, k1, p13, k4.
• Row 5: K3, yo, [k2tog] twice, yo, k6, yo, k2, ssk, p1, k2tog, k3, yo, k2tog, yo, k3tog, yo, k2tog, yo, k7, yo, k6, [yo, k2tog] twice, yo, k2 (50 sts).
• Row 6: Yo, p2tog, p30, k1, p13, k4.
• Row 7: K3, yo, [k2tog] twice, yo, k6, yo, k2, ssk, p1, k2tog, k3, yo, k5tog, yo, k4, p1, k4, yo, k4, ssk, yo, k1, [yo, k2tog] twice, yo, k2 (49 sts).
• Row 8: Yo, p2tog, p17, k1, p11, k1, p13, k4.
• Row 9: K3, yo, [k2tog] twice, yo, k6, yo, k2, ssk, p1, k2tog, k2, yo, k2tog, yo, k3, ssk, p1, k2tog, k3, yo, k3, ssk, yo, k3, [yo, k2tog] twice, yo, k2.
• Row 10: Yo, p2tog, p18, k1, p10, k1, p4, [kfb] 6 times, p3, k4 (55 sts).
• Row 11: K3, yo, [k2tog] twice, yo, p12, yo, k2, ssk, p1, k2tog, k1, yo, k2tog, yo, k3, ssk, p1, k2tog, k3, yo, k4, yo, k2tog, k3, [yo, k2tog] twice, yo, k2.
• Row 12: Yo, p2tog, p19, k1, p9, k1, p4, [k2tog] 6 times, p3, k4 (49 sts).
• Row 13: K3, yo, [k2tog] twice, yo, p6, yo, k2, ssk, p1, k2, yo, k2tog, yo, k3, ssk, p1, k2tog, k3, yo, k4, yo, k2tog, k1, ssk, [yo, k2tog] 3 times, k1 (48 sts).
• Row 14: Yo, p2tog, p18, k1, p9, k1, p4, [k2tog] 3 times, p3, k4 (45 sts).
• Row 15: K3, yo, k2tog, [k1, yo] twice, p3tog, yo, k2, ssk, p1, k2, yo, k2tog, yo, k3, ssk, p1, k2tog, k2, yo, kfb, yo, k5, yo, k3tog, [yo, k2tog] 3 times, k1 (46 sts).
• Row 16: Yo, p2tog, p19, k1, p9, k1, p10, k4.
• Row 17: K3, yo, k2tog, k1, yo, k3, yo, k2tog, yo, k1, ssk, p1, k2, yo, k2tog, yo, k3, ssk, p1, k2tog, k2, yo, [kfb] 3 times, yo, k5, k2tog, [yo, k2tog] 3 times, k1 (50 sts).
• Row 18: Yo, p2tog, p22, k1, p9, k1, p11, k4.
• Row 19: K3, yo, k2tog, k1, yo, k5, yo, k2tog, yo, ssk, p1, [k2tog, yo] twice, k3, ssk, p1, k2tog, k2, yo, k6, yo, k2tog, k3, k2tog, [yo, k2tog] 3 times, k1 (49 sts).
• Row 20: Yo, p2tog, p21, k1, p8, k1, p12, k4.
• Row 21: K3, yo, k2tog, k1, yo, k7, yo, k2tog, yo, k3tog, yo, k2tog, yo, k3, ssk, p1, k2tog, k2, yo, k6, yo, k2tog, k2, k2tog, [yo, k2tog] 3 times, k1 (48 sts).
• Row 22: Yo, p2tog, p20, k1, p21, k4.
• Row 23: K3, yo, k2tog, k1, yo, k4, p1, k4, yo, k5tog, yo, k3, ssk, p1, k2tog, k2, yo, k6, yo, k2tog, k3, [yo, k2tog] 3 times, k1 (46 sts).
• Row 24: Yo, p2tog, p10, [kfb] 6 times, p4, k1, p11, k1, p7, k4 (52 sts).
• Row 25: K3, yo, k2tog, k1, yo, k3, ssk, p1, k2tog, k3, yo, k2tog, yo, k2, ssk, p1, k2tog, k2, yo, p12, yo, k2tog, k3, [yo, k2tog] 3 times, k1 (51 sts).
• Row 26: Yo, p2tog, p10, [k2tog] 6 times, p4, k1, p10, k1, p7, k4 (45 sts).
• Row 27: K3, yo, k2tog, k1, yo, k3, ssk, p1, k2tog, k3, yo, k2tog, yo, k1, ssk, p1, k2tog, k2, yo, p6, yo, k2tog, k1, k2tog, [yo, k2tog] 3 times, k1 (43 sts).
• Row 28: Yo, p2tog, p9, [k2tog] 3 times, p4, k1, p9, k1, p7, k4 (40 sts).
• Row 29: K3, yo, k2tog, k1, yo, k3, ssk, p1, k2tog, k3, yo, k2tog, yo, k2, p1, k2tog, k2, yo, p3tog, yo, k1, yo, k3, [yo, k2tog] 3 times, k1.
• Row 30: Yo, p2tog, p16, k1, p9, k1, p7, k4.