Each ball weighs 50 grams and has 150 meters. This is a fine weight yarn and we recommend using size 4 - 7 (U.S.)/(3.5 - 4.5 mm) knitting needles and size C2 (U.S.)/(2.5 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 24 sts and 34 rows. Machine washable up to 30º using a wool cycle. Do not tumble dry.