Pattern: Turbine by Woolly Wormhead from Twisted Woolly Toppers
Yarn: Tosh Vintage in Grove
Needles: US #8 Addi Turbo
Mods: Went up a needle size and knit the largest size in order to get a man-head size hat. I also used the Old Norwegian (aka Twisted German) cast on for added stretch around the brim since there's no ribbing to keep it snug, yet stretchy. If you don't know that cast on you can find it here *- I learned it in a class from Evelyn Clark and it's fantastically elastic. It's also a great cast on for lace since it allows for maximum blocking.
*The video is fairly long so you can skip to the 2min 50sec mark to see the cast on itself.