Since the length of the base was correct, I finished by adding three more rows, reducing a few stitches at each end to make it a little rounder shape.
Then I cut several pieces of yarn a little more than double the length I wanted it, and looped it around the stitches.
It looked pretty shaggy so I gave it a trim.
And used a few of the longer trimmings for the mustache.
The ‘stache might still need a bit of a trim. I will attach it to a hat so my son can easily put it on and take it off.