With the yarn still on your fingers, wrap the 12” around the pompom in between your fingers. Tie once loosely.
Replace your fingers with a pencil at both ends. Now, tie the 12” yarn tightly around in a double knot.
Follow the pencil with your scissors, remove the pencil and cut the loops. Repeat with the other pencil.
Fluff carefully. Trim with scissors if any yarn pieces are hanging out awkwardly. This made about a 3” pompom using Boa yarn by Bernat.