100% Extrafine superwash Merino wool3.5 oz. / 100g220yds / 200m16 - 20 sts = 4" stockinetteUS 6 - 9 / 4.0-5.5mm16 - 20 sts = 4" single crochetUS G6 - I9 / 4.0 - 5.5mmMachine wash cool, dry flat. Wash in a mesh washing bag for best results.