Shown with a cast-on count of 26 stitches.  

• Row 1 (WS): K8, p10, k8.
• Row 2: P6, p2tog, [k1, yo] twice, k1, M1Lp, k4, M1Rp, [k1, yo] twice, k1, p2tog, p6 (30 sts).
• Row 3: K7, p5, k1, p4, k1, p5, k7.
• Row 4: P5, p2tog, k2, yo, k1, yo, k2, pfb, 2/2 LC, pfb, k2, yo, k1, yo, k2, p2tog, p5 (34 sts).
• Row 5: K6, p7, k2, p4, k2, p7, k6.
• Row 6: P4, p2tog, k3, yo, k1, yo, k3, pfb, p1, k4, p1, pfb, k3, yo, k1, yo, k3, p2tog, p4 (38 sts).
• Row 7: K5, p9, k3, p4, k3, p9, k5.
• Row 8: P3, p2tog, k4, yo, k1, yo, k4, pfb, MB, p1, 2/2 LC, p1, MB, pfb, k4, yo, k1, yo, k4, p2tog, p3 (42 sts).
• Row 9: K4, p11, k4, p4, k4, p11, k4.
• Row 10: P2, p2tog, ssk, k7, k2tog, pfb, MB, p2, k4, p2, MB, pfb, ssk, k7, k2tog, p2tog, p2 (38 sts).
• Row 11: K3, p9, k5, p4, k5, p9, k3.
• Row 12: P1, p2tog, ssk, k5, k2tog, pfb, MB, p3, 2/2 LC, p3, MB, pfb, ssk, k5, k2tog, p2tog, p1 (34 sts).
• Row 13: K2, p7, k6, p4, k6, p7, k2.
• Row 14: P2, ssk, k3, k2tog, pfb, MB, p4, k4, p4, MB, pfb, ssk, k3, k2tog, p2 (32 sts).
• Row 15: K2, p5, k7, p4, k7, p5, k2.
• Row 16: P2, ssk, k1, k2tog, pfb, MB, p5, 2/2 LC, p5, MB, pfb, ssk, k1, k2tog, p2 (30 sts).
• Row 17: K2, p3, k8, p4, k8, p3, k2.
• Row 18: P2, sl1-k2tog-psso, p1, MB, p3, k1, 2/2 LC, 2/2 RC, k1, p3, MB, p1, sl1-k2tog-psso, p2 (26 sts).