This pattern is a simple bottom-up pattern. It is worked in two continuous parts; part one is the brim/ribbing, which is worked in rows and then joined together. Part two is worked in the round.
This pattern is more of a tutorial than an actual pattern. The steps will give you the end beanie, but there is not a specific set of stitches. (I have provided an outline for the brim in the pattern for three sizes to help)
I used basic worsted weight yarn (Red Heart and Red Heart With Love) and a size 5.00mm crochet hook to make this beanie. You can use other yarn or hooks, but please be aware that you will need to adjust how many times you repeat sections.
One skein of each color (or one skein of a solid color) is all that is needed for the beanie. The pattern is written for the beanie to be worked in two colors, but you can work in one color, or you can work in multiple colors.
A yarn needle will come handy at the end when you need to close up the top, although it is not necessary. you can use your crochet hook.