Each ball weighs 100 grams and has 140 meters. This is a medium weight yarn and we recommend using size 10-10 ½ (U.S.)/(6-6.5 mm) knitting needles. 4 balls of yarn are required to make a size 12 woman’s long sleeve jumper. To make a 4x4” tension square work 11 sts and 16 rows. Machine wash up to 30ºC on a wool cycle. Do not tumble dry.