This is a fairly simple hat to make, it takes more than 1 skein if using the lions brand thick and quick yarn. The brim alone takes almost 1 skein. Contrasting colors are good to have. If you want to make the wizard hat with starts just add appliques.
If you get the “Loom Knit Costume Hats” ebook you can get the pattern in the 36 and 41 peg knifty knitter loom as well as the 44 and 59 peg 1/2 gauge CinDwood looms. This offers mor sizes as well.