Each ball weighs 50 grams and has 100 meters. This is a medium weight yarn and we recommend using size 4-6 (U.S.)/(3.5-4 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 16 sts and 25 rows. Machine washable up to 30º. Do not tumble dry.