This is a Pom Pom Kit from Prym. It comes with 3 different sized Pom Pom Makers. They are easy to use & comes with step by step picture instructions. If you add or take away the amounts of wool this also increases & decreases the size of pom pom that you can achieve. You will need to provide your own wool. The pom pom makers are made of durable plastic. The sizes each kit comes with is 0.9cm, 3.3cms & 5cms.