This adorable beanie can be made in any size with any weight yarn, AND any needle!
You'll need:
Any sized hook
Any weight yarn
Tapestry needle
Tape measure
Pom Pom (optional)
Tag (optional)

Standard U.S terms.

The stitches you'll need to know are:
Half double crochet foundation chain, chain, puff stitch (instructions in the pattern), half double crochet, half double crochet in the 3rd loop.