Making your own pom-poms can be a fun way to decorate hats, scarves and other crafts, though why not make it easy with these handy pom-pom-making rings by Addi! The Addi Moon Pom-Pom ring set consists of four different rings in 3.5cm, 5.5cm, 7cm and 9cm diameters. Suitable for use with all yarns, ribbons and fabrics.