Just had to make up a little monkey hat to throw in my photo prop stash. And of course had to try it out on a few monkeys of my own. One was pretty OK with it, the other....not so much....You know me though. I will take what I can get.
As for pattern I just basically worked up a hat with ear flaps and added some circles to the sides but if you want a pattern more concrete then that there is this one.....Easy Monkey Hat
And this one, not quite pattern but a little more tutorial ....DIY monkey hat
Now who can get their monkey to wear it the longest????