This Canadian made faux fur pompom are now it 2 sizes; the large is 6" and the medium is 5" of fluffiness.
It comes with a cord and a wood button to secure it to your knitted hat. The button goes on the inside of the hat and then the pompom goes on the outside and feeds the cord through the knitting and through the button. Tie it off against the button and trim the cord shorter. The button stabilizes the pompom on the hat and makes it easy to take off the pompom when you wash your hat.