Content: 100% recycled cotton, Care: This yarn for knitting, crocheting, amigurumi and craft projects is easy to care for, simply machine wash and dry all crafted items. Crochet Hook Recommended: 2.5 mm (U.S. J) crochet hook Ball Size: Each ball of this #1 – Super Fine (Fingering) Yarn is 70g(2.5 oz) and 49m( 54yd) long