100% Cotton Yarn - Cornflower 25g ball of 100% cotton yarn. £1.25 Out of stock. 0 in your basket View Basket Checkout Each ball of 100% cotton yarn is 25g in weight, length 60m. Perfect for crochet using a size 3mm, 3.5mm or 4mm crochet hook. For knitting they are suitable for size 4mm or 5mm needles. Washable at 30 degrees.