Shown with a cast-on count of 30 stitches.  

• Rows 1 and 3 (RS): *BrSl, k1, repeat from *.
• Rows 2 and 4: *BrSl, k1, repeat from *.
• Row 5: [BrSl, k1] twice, brSl, yo, k1, brSl, k1, brSl, k3tog, *brSl, k1, repeat from * (multiple of 2 sts, plus 11).
• Row 6: *BrSl, k1, repeat from * to last 7 sts, brSl, p1, incR, k1, [brSl, k1] twice (multiple of 2 sts, plus 8).
• Row 7: [BrSl, k1] 3 times, brSl, yo, brSl, k1, brSl, k1, k3tog, *brSl, k1, repeat from * (multiple of 2 sts, plus 13).
• Row 8: *BrSl, k1, repeat from * to last 9 sts, brSl, pfb, k1, [brSl, k1] 3 times (multiple of 2 sts, plus 10).
• Row 9: [BrSl, k1] 4 times, brSl, yo, brSl, k1, brSl, k1, k3tog, *brSl, k1, repeat from * (multiple of 2 sts, plus 15).
• Row 10: *BrSl, k1, repeat from * to last 11 sts, brSl, pfb, k1, [brSl, k1] 4 times (multiple of 2 sts, plus 12).
• Row 11: [BrSl, k1] 5 times, brSl, yo, brSl, k1, brSl, k1, k3tog, *brSl, k1, repeat from * (multiple of 2 sts, plus 17).
• Row 12: *BrSl, k1, repeat from * to last 13 sts, brSl, pfb, k1, [brSl, k1] 5 times (multiple of 2 sts, plus 14).
• Row 13: [BrSl, k1] 6 times, brSl, yo, brSl, k1, brSl, k1, k3tog, *brSl, k1, repeat from * (multiple of 2 sts, plus 19).
• Row 14: *BrSl, k1, repeat from * to last 15 sts, brSl, pfb, k1, [brSl, k1] 6 times (multiple of 2 sts, plus 16).
• Row 15: [BrSl, k1] 7 times, brSl, yo, brSl, k1, brSl, k1, k3tog, *brSl, k1, repeat from * (multiple of 2 sts, plus 21).
• Row 16: *BrSl, k1, repeat from * to last 17 sts, brSl, pfb, k1, [brSl, k1] 7 times (multiple of 2 sts, plus 18).
• Row 17: [BrSl, k1] 8 times, brSl, yo, brSl, k1, brSl, k1, k3tog, *brSl, k1, repeat from * (multiple of 2 sts, plus 23).
• Row 18: *BrSl, k1, repeat from * to last 19 sts, brSl, pfb, k1, [brSl, k1] 8 times (multiple of 2 sts, plus 20).
• Row 19: [BrSl, k1] 9 times, brSl, yo, brSl, k1, brSl, k1, k3tog, *brSl, k1, repeat from * (multiple of 2 sts, plus 25).
• Row 20: *BrSl, k1, repeat from * to last 21 sts, brSl, pfb, k1, [brSl, k1] 9 times (multiple of 2 sts, plus 22).