Each ball weighs 50 grams and has 130 meters. This is a medium weight yarn and we recommend using size 6-8 (U.S.)/(4-5 mm) knitting needles and size G6-7 (U.S.)/(4-4.5 mm) crochet hook. 6 balls of yarn are required to make a size 12 woman’s long sleeve jumper. To make a 4x4” tension square work 15 sts and 22 rows. Hand wash. Do not tumble dry.