Each ball weighs 100 grams and has 85 meters. This is a heavy weight yarn and we recommend using size 13-15 (U.S.)/(9-10 mm) knitting needles. 5 balls of yarn are required to make a size 12 woman’s long sleeve jumper. To make a 4x4” tension square work 8 sts and 11 rows. Machine wash up to 30ºC on a wool cycle. Do not tumble dry.