This pattern takes approximately 150 yards of worsted weight yarn - wool is recommended, though it might be lovely in a wool/alpaca blend for a bit more slouch.
US 6, 16” circular needles used to knit the ribbing
US 10.5, 16” circular and double pointed needles used to complete the balance of the hat
11 sts/2” in ribbing
9 sts/2” in stockinette
17.5” brim unstretched
8” in height