Shown with a cast-on count of 7 stitches.  

• Row 1 (RS): K7.
• Row 2: K7.
• Row 3: K2, yo, k1, yo, k1, yo, k1, yo, k2 (11 sts).
• Row 4: K2, p7, k2.
• Row 5: K2, yo, k3, yo, k1, yo, k3, yo, k2 (15 sts).
• Row 6: K2, p11, k2.
• Row 7: K2, yo, k5, yo, k1, yo, k5, yo, k2 (19 sts).
• Row 8: K2, p15, k2.
• Row 9: K2, yo, k1, yo, ssk, k1, k2tog, yo, k1, yo, k1, yo, k1, yo, ssk, k1, k2tog, yo, k1, yo, k2 (23 sts).
• Row 10: K2, p19, k2.
• Row 11: K2, *yo, k3, yo, sl1-k2tog-psso, yo, k3, yo, k1, repeat from * to last st, k1 (27 sts).
• Row 12: K2, p23, k2.