Each ball weighs 50 grams and has 115 meters. This is a medium weight yarn and we recommend using size 6-7 (U.S.)/(4-4.5 mm) knitting needles or size E3 (U.S.)/(3.5 mm) crochet hook. 8 balls of yarn are required to make a size 12 woman’s short sleeved jumper. To make a 4x4” tension square work 17 sts and 22 rows. Machine washable up to 30º. Do not tumble dry.