Shown with a cast-on count of 23 stitches.  

• Row 1 (RS): K3, yo, [k1, yo, sl1-k2tog-psso, yo] 4 times, k1, yo, k3 (25 sts).
• Row 2: K2, p1, yo, purl to last 3 sts, yo, p1, k2 (27 sts).
• Row 3: K3, yo, [k1, yo, sl1-k2tog-psso, yo] 5 times, k1, yo, k3 (29 sts).
• Row 4: K2, p1, yo, purl to last 3 sts, yo, p1, k2 (31 sts).
• Row 5: K3, yo, [k1, yo, sl1-k2tog-psso, yo] 6 times, k1, yo, k3 (33 sts).
• Row 6: K2, p1, yo, purl to last 3 sts, yo, p1, k2 (35 sts).