Punch card pattern by moipouf, hat by me.

Swatch
48 sts = 7.5 in
36 sts = 4 in

Hat
22 in = 141 sts
Tension 10
Mock rib for 10 r
Punch card for 3 repeats
Dec across
Tension to 5
K to 60 rows (next time do to 65)
Thread & cinch.

Came out quite snug for 22”. Could use an extra 5 sts & 5 r.