Knit the Botanical Swirl Hat for babies through adults. Knit for heads sized 18-20" (20-21", 21" and up) with 200 yards of Worsted Weight Wool such as Shepherd's Wool by Stonehedge Fiber Mill (100% Merino Wool, 250yds/skein) in a main color, 75 yards in each of 2 shades of Green, and less than 5 yards of Brown. Suggested needles are US 8 (5mm) Needles. You will also need a Yarn Needle.