Narrow for the crown; Knit 2, Purl 2 together, around.
Work 3 more rounds on the stitches as they appear (Knit 2, Purl 1).
Next narrowing; Knit 2 together, Purl for a round, work 3 more rounds on the stitches as they appear. Final narrow; Knit 2 together all around, knit one round.
Clip the yarn about 12 cm long and thread through the stitches, draw tightly together.
Tidy up the cast on edge and add a pompom.
So by using a different yarn (weight) and making an educated guess about the number of stitches to use, a ribbed hat is straighforward to accomplish. Next season I am going to work the knit ribs as a twisted stitch. That is, knit the second stitch first and the first stitch second, every 4th round, just for a change.
Speaking of pompom's, as I finished this hat, the loyal opposition suggested using a contrasting colour, hmmm. Great idea! Out comes my trusty Clover pompom maker.
Pom pom festival!