Cascade 220 Superwash 1925 Cobalt Heather Yarn 100% Wool DK Weight at 5 sts (US#7) to 5.5 sts (US#6) per inch. Or a 4.5mm-5mm crochet hook Nearly 200 shades, always in stock! 220 Yards, 100 grams. A classic bestseller, year after year. 100% Superwash wool, great for every knit and crochet project! Machine Wash Warm,Tumble Dry Normal, No Bleach