Book 2. When wearing this beanie, a ribbed band helps keep it securely in place. Instructions for sizes small, medium and large are outlined (with head circumference sizes of 17", 20", and 23" [43 cm, 51 cm, 58.5 cm]); included are bonus on-line tutorials. Choose super bulky weight yarn, 16" circular knitting needles in two sizes, Size 11 (8 mm) and Size 9 (5.5 mm), plus double pointed needles in Size 11 (8 mm). The suggested skill Level to complete this project is rated as easy.