Cast on 80 stitches.
Work in Garter stitch (knit every row) until piece measures about 12 in. (30.5 cm) from cast-on edge. Bind off, leaving a long tail.
Sew side seam to form a tube, reversing seam for a 3 in. (7.5 cm) at cast-on edge for ‘cuff.’ Weave tail through stitches of bound-off edge and pull tight to gather top of Hat, knot securely.
Follow package instructions to make a pompom. Tie pompom to top of Hat.
Weave in ends.