Berroco Sox is a superb woolen sock yarn that patterns all by itself as you knit your socks in the round. One 100 gram ball makes a pair. Choose from an assortment of engineered color patterns. Made in ItalyBall Weight:3.5 oz / 100 gBall Length:440 yds / 406 mGauge:7.5 sts = 1″30 sts & 40 rows = 4″ (10cm)Needle Size:2 (US) / 2.75 mmYarn Fiber Info: 75% Superwash Wool, 25% NylonYarn Wash Info: Machine wash. Lay flat to dry.