Content: 100% Polyester, Care: This yarn for knitting, crocheting, amigurumi and craft projects is easy to care for, simply machine wash (not exceeding 104F/40C) at delicate setting, Do not Bleach, Tumble Dry at low heat, at permanent press setting, Do not iron or press! Ball Size: Each ball of this #4 – Worsted (Medium) Yarn is 50g(1.8 oz) and 46m(50 yd) long Knitting Gauge: 4" x 4" (10cm x 10cm) 17 sts x 23 r with 5 mm (US 8) Knitting Needles Crochet Gauge: 4" x 4" (10cm x 10cm) 12 sc x 15 r with 5.5 mm (US I-9) Crochet Hook