The Prym pom-pom set allows the creation of pom-poms in 4 different sizes: 3 cm, 4.5 cm, 5.5 cm, and 9 cm. Each ring consists of four parts, two of which can be combined into a half-ring and wrapped with wool yarn. Then, the two halves are combined with the connecting clips and the wool is cut along the groove between the rings. A thread of wool is tightened in the groove, tied, and the ring is removed. A few decorations are made and the pom-pom is finished.