Uptown Baby Sport is 100% pill-resistant acrylic yarn. Super soft in a wide array of shades, Uptown Baby Sport looks and feels great in projects for children. 330m (361yds) and 100g (3.5oz). 100% Anti-Pilling Acrylic. Machine wash cold, tumble dry low. 5 balls/bag. The recommended knitting needle is 3.5mm (US size 4) = 24 sts x 30 rows = 10cm (4″) in ST st. The recommended crochet hook is 4mm (US size G-6) = 24 sc x 28 rows = 10cm (4″). Remember to ALWAYS check tension/gauge before beginning your project.