This is a free pattern that you can download above!
Also if you need help, there's a free video tutorial on YouTube that takes you step-by-step through making both the Santa hat (pixie, elf) and the striped beanie hat.
You just need to know how to crochet a chain and a single crochet stitch.
And the video also shows an easy way to change colors/join yarn for the stripes without having to cut yarn/weave in ends!
250 yards of Worsted weight