I wrote the pattern myself. I’m an amateur so knit at your own risk.

~70 yards of super bulky yarn (I used Cascade Kenai)
Us 15s, 16” circ for knitting in the round.

Cast on 40, place marker and join for knitting in the round.

Row 1: purl
Row 2: purl
Row 3: knit
Row 4: knit
Row 5: purl
Row 6: (yo 2x, knit 1) to end of round
Row 7: (drop both yo off needle, k1)
Repeat Row 2 through 7 twice more.
Row 20: purl
Row 21: knit
Row 22: knit
Row 23: purl
Row 24: bind off (I bound off in purl using JSSBO)

Finished measurements unstretched and unblocked: 8” tall, 20” around