Cascade 220 Yarn #8408 Smoke Yarn: Worsted Weight, 100% Peruvian Highland Wool Yarn Knitting Needle Size / Knitting Gauge: US 7 - 8 or 4.5 - 5.0 mm / 18 - 20 = 4" (10 cm) Crochet Hook Size: H / 5.00 mm (I / 5.50 mm, J / 6.00 mm) Wt / Yardage: 100 gm / 220 yards Hand Wash Cold. Lay Flat to Dry.