Commercial Pompom makers are available but I have always preferred to use a cardboard template, as they can be ripped to easily remove them from the Pompom. The template is basically two pieces of circular card with a hole cut out of the center. The size of the inner hole determines how full your Pompom will be (how many threads will make it up). The gap between the inner and the outer circle depends on how long the threads are in the Pompom.