Shown with a cast-on count of 72 stitches.  

• Rounds 1-30: K72.
• Round 31: *K2tog, k7, repeat from * (64 sts).
• Round 32: *K2tog, k6, repeat from * (56 sts).
• Rounds 33 and 37: Knit.
• Round 34: *K2tog, k5, repeat from * (48 sts).
• Round 35: [K2tog, k5] 6 times, knit (42 sts).
• Round 36: *K2tog, k4, repeat from * (35 sts).
• Round 38: *K2tog, k3, repeat from * (28 sts).
• Round 39: [K2tog, k3] 5 times, k2tog, knit (22 sts).
• Round 40: [K2tog, k2] 5 times, knit (17 sts).
• Round 41: [K2tog, k2] 4 times, knit (13 sts).
• Round 42: [K2tog, k1] 4 times, knit (9 sts).