Shown with a cast-on count of 20 stitches.  

• Rounds 1-20: [K2, p2] 5 times.
• Round 21: K6, yo, [k1, p1] 6 times, k1, sl1 wyib (21 sts).
• Round 22: K6, k1 tbl, [p1, k1] 7 times.
• Round 23: K7, yo, [k1, p1] 6 times, k1, sl1 wyib (22 sts).
• Round 24: K7, k1 tbl, [p1, k1] 7 times.
• Round 25: K8, yo, [k1, p1] 6 times, k1, sl1 wyib (23 sts).
• Round 26: K8, k1 tbl, [p1, k1] 7 times.
• Round 27: K9, yo, [k1, p1] 6 times, k1, sl1 wyib (24 sts).
• Round 28: K9, k1 tbl, [p1, k1] 7 times.
• Round 29: K10, yo, [k1, p1] 6 times, k1, sl1 wyib (25 sts).
• Round 30: K10, k1 tbl, [p1, k1] 7 times.
• Round 31: K11, yo, [k1, p1] 6 times, k1, sl1 wyib (26 sts).
• Round 32: K11, k1 tbl, [p1, k1] 7 times.
• Round 33: K12, yo, [k1, p1] 6 times, k1, sl1 wyib (27 sts).
• Round 34: K12, k1 tbl, [p1, k1] 7 times.
• Round 35: K13, yo, [k1, p1] 6 times, k1, sl1 wyib (28 sts).
• Round 36: K13, k1 tbl, [p1, k1] 7 times.
• Round 37: K14, yo, [k1, p1] 6 times, k1, sl1 wyib (29 sts).
• Round 38: K14, k1 tbl, [p1, k1] 7 times.
• Round 39: K15, yo, [k1, p1] 6 times, k1, sl1 wyib (30 sts).
• Round 40: K15, k1 tbl, [p1, k1] 7 times.
• Round 41: K16, yo, [k1, p1] 6 times, k1, sl1 wyib (31 sts).
• Round 42: K16, k1 tbl, [p1, k1] 7 times.
• Round 43: K17, yo, [k1, p1] 6 times, k1, sl1 wyib (32 sts).
• Round 44: K17, k1 tbl, [p1, k1] 7 times.
• Round 45: K18, yo, [k1, p1] 6 times, k1, sl1 wyib (33 sts).
• Round 46: K18, k1 tbl, [p1, k1] 7 times.
• Round 47: K19, yo, [k1, p1] 6 times, k1, sl1 wyib (34 sts).
• Round 48: K19, k1 tbl, [p1, k1] 7 times.
• Round 49: K20, yo, [k1, p1] 6 times, k1, sl1 wyib (35 sts).
• Round 50: K20, k1 tbl, [p1, k1] 7 times.
• Round 51: K21, yo, [k1, p1] 6 times, k1, sl1 wyib (36 sts).
• Round 52: K21, k1 tbl, [p1, k1] 7 times.
• Round 53: K22, yo, [k1, p1] 6 times, k1, sl1 wyib (37 sts).
• Round 54: K22, k1 tbl, [p1, k1] 7 times.
• Round 55: K23, yo, [k1, p1] 6 times, k1, sl1 wyib (38 sts).
• Round 56: K23, k1 tbl, [p1, k1] 7 times.
• Round 57: K24, yo, [k1, p1] 6 times, k1, sl1 wyib (39 sts).
• Round 58: K24, k1 tbl, [p1, k1] 7 times.
• Round 59: K25, yo, [k1, p1] 6 times, k1, sl1 wyib (40 sts).
• Round 60: K25, k1 tbl, [p1, k1] 7 times.