Each ball weighs 50 grams and has 125 meters. This is a fine weight yarn and we recommend using size 4-6 (U.S.)/(3.5-4 mm) knitting needles and size E4 (U.S.)/(3.5 mm) crochet hook. 10 balls of yarn are required to make a size 12 woman’s long sleeve jumper. To make a 4x4” tension square work 23 sts and 30 rows. Machine wash up to 30ºC. Do not tumble dry.