Content: 100% polyester, Care: This yarn for knitting, crocheting, amigurumi and craft projects is easy to care for, simply machine wash and dry all crafted items. Gauge #7 Jumbo Yarn. Knitting Gauge: Needles are not required. Crochet Gauge: Hooks are not required Ball Size: Each ball of this #7 Jumbo Gauge Yarn is 180g (6.4 oz) and 16m (18 yd) long.