Knit the largest size Skull Cap (pattern is sized for babies through adults) 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 and less than 75 yards in a contrasting color. Suggested needles are US 8 (5mm) 16" (40cm) Circular Needles. You will also need a Yarn Needle, a sewing needle and thread, and 1/8 yard of fabric of your choice to make brim/lining.