James C Brett Twisted in Black comes in a 100g Balls. It is 100% Premium Acrylic. It is an Aran/4Worsted weight wool & size 5mm knitting needles/hook are recommended, but always check your pattern & tension first. The wool when knitted up gives a lovely Tweed effect. Each ball measures approx 200m/218yds. It is machine washable on a 30 wash.