Shown with a cast-on count of 25 stitches.  

• Row 1 (RS): K9, k2tog, yo, k1, yo, k1, yo, k1, yo, ssk, k9 (27 sts).
• Row 2: P8, ssp, p7, p2tog, p8 (25 sts).
• Row 3: K7, k2tog, k1, yo, k1, yo, k3, yo, k1, yo, k1, ssk, k7 (27 sts).
• Row 4: P6, ssp, p11, p2tog, p6 (25 sts).
• Row 5: K5, k2tog, k2, yo, k1, yo, k5, yo, k1, yo, k2, ssk, k5 (27 sts).
• Row 6: P4, ssp, p15, p2tog, p4 (25 sts).
• Row 7: K3, k2tog, k3, yo, k1, yo, k7, yo, k1, yo, k3, ssk, k3 (27 sts).
• Row 8: P2, ssp, p19, p2tog, p2 (25 sts).
• Row 9: K1, k2tog, k4, yo, k1, yo, k9, yo, k1, yo, k4, ssk, k1 (27 sts).
• Row 10: Ssp, p23, p2tog (25 sts).
• Row 11: Knit.
• Row 12: Purl.