This Aida 6ply crochet cotton is 100% mercerised and perfect for any crocheter. With 100% cotton these 50g balls give you a length of 400m for ticket 20 and 265m for ticket 10. We would recommend using 0.75-1mm Crochet hooks for ticket 20 and 1.25-1.5mm crochet hooks for ticket 10.