We R Memory Keepers-DIY Party Pom Pom Maker:
Three sizes. Create pomp oms for garlands, gifts and more! Package contains one large pom pom maker (2-3/8 inches), one medium pom pom maker (1-5/8 inches) and one small pom pom maker (1-1/4 inches).
Watch this Video to see how to use a Pom-Pom Maker. This video features the Clover Pom-Pom Makers but this set is used the same way.
Instructions start at 2:17 minutes in if you want to start there.
Video by B.Hooked Crochet