Yarn LANGYARNS MILLE COLORI BABY (virgin wool superwash) 100g - 2 balls of green-petrol-rose 845.0209. Needles & Notions US 8 (5 mm) Crochet hook, size US 7 (4.5 mm) The hat is knitted with the yarn double. Gauge 21 stitches and 36 rows = 4 inches in Ridge pattern with 2 starnds of yarn Yardage 416 yards (380 m) Sizes available child / adult