Each ball weighs 50 grams and has 180 meters. This is a medium weight yarn and we recommend using size 6-9 (U.S.)/(4-5.5 mm) knitting needles or size D3-E4 (U.S.)/(3-3.5 mm) crochet hook. 6 balls of yarn are required to make a size 12 woman’s short sleeved jumper. To make a 4x4” tension square work 21 sts and 28 rows. Machine washable up to 30º. Do not tumble dry.