Each ball weighs 50 grams and has 125 meters. This is a medium weight yarn and we recommend using size 8-9 (U.S.)/(5-5.5 mm) knitting needles. 5 balls of yarn are required to make a size 12 woman’s short sleeved jumper. To make a 4x4” tension square work 14 sts and 16 rows. Machine washable up to 30º. Do not tumble dry.