Shown with a cast-on count of 19 stitches.  

• Rows 23, 25, 27, 29, 31, 33, 35, 37, and 39 (WS): Purl.
• Row 24: K1, k2tog, k5, sl2-k1-p2sso, k5, ssk, k1 (15 sts).
• Row 26: K1, k2tog, k3, sl2-k1-p2sso, k3, ssk, k1 (11 sts).
• Row 28: K4, sl2-k1-p2sso, k4 (9 sts).
• Row 30: K3, sl2-k1-p2sso, k3 (7 sts).
• Row 32: K2, sl2-k1-p2sso, k2 (5 sts).
• Row 34: K1, k2tog, k2 (4 sts).
• Row 36: K1, k2tog, k1 (3 sts).
• Row 38: Sl2-k1-p2sso (1 st).
• Row 40: K1.