Double knit hat is so cleverly done! You wont believe it.This is like having 2 hats on your head at once, both side are stockinette stitch, making it completely reversible! This is knit in one easy piece! Matching scarf is 50 inches long. Can be made longer or shorter. Also given are sizes for children. Uses worsted weight yarns, knitting needles, US # 9, in 16 or 24 circular. Use size # 7 for children. This makes the warmest hat and scarf ever, so knit up one for a gift for your friends that live in cold climates! Scarf is double thick too!