My only qualm is that I haven't really made hats for other people so I'm not quite confident in my gauge. I used size 3 needles for the brim of the hat (which I ended up doing in 2x2 seed stitch and turned out looking wavy and interesting. I like it!), and then did the rest in size 5 circular, trying to keep the tension pretty tight.
This is how it turned out! I'd have pics of me wearing it but I got my wisdom teeth out on Friday and my face is really puffy still >_<
Thanks for reading!