This crochet baby hat is worked in the round from crown to base using the front post double crochet stitch. This unique stitch pattern gives a lovely ribbing texture. You will also need to be familiar with the reverse single crochet stitch for the hat trim. If this is a new stitch to you, I recommend watching my tutorial here:

How to Crochet the Reverse Single Crochet with Brittany

You can easily increase the length of your hat by adding more rows to the bottom before adding the reverse single crochet round.

If you have any questions, please feel free to ask me in the comments section!