Each ball weighs 50 grams and has 200 meters. This is a medium weight yarn and we recommend using size 7-8 (U.S.)/(4.5-5 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 17 sts and 25 rows. Machine washable up to 30ºC on a wool cycle. Do not tumble dry.