It's not too late to make this for Hallowe'en. Original zsa mask pattern via smaller and pinterest. My pattern notes below. Pattern was created by Mme ZsaZsa.
This is the easiest, fastest hat to make. I originally made this for Auggie because he wanted to be a black cat for Hallowe'en. He's since changed his mind, but now we have a hat.
This would be good for a bat, cat or Batman costume and it's nice and cozy. Don't be lazy and knit this in the round — the seaming helps the hat hold it's shape :) This is a good seaming tutorial if you are new to it.
I used Blue Sky Worsted cotton (the same as for the Windy scarf) in Ink but if Auggie hadn't specified black I would have used the Graphite. I would only use cotton for this hat unless we lived in the Yukon — it's a thick knit.