First I cut a piece of yarn from the same yarn I want to make my pom-pom out of. Cut it about 6-8 inches long. Next slide it between your ring and middle finger like you are flossing your teeth. This will be used later to secure the pom-pom.
Next start wrapping the yarn around your fingers a million times or until it is very thick. Be careful not to wrap up the yarn you flossed your fingers with. A heavier weight yarn (thicker) will work up quicker and take less yarn than a light weight one. The one I used for this tutorial is a bulky weight (#5) washable wool. It just depends on the look you like. I found that the thicker yarn gives it a fluffier appearance.
When your fingers are nicely cocooned in yarn, cut it from the skein/ball. Now take the two loose ends of your finger floss and bring them up to the top of your fingers like so.
Its really super quick and easy. I made a bunch the other night while watching Netflix. Made with my fingers they are about 3 inch sized pom-poms. Just use less fingers for smaller sizes. No need to buy a pom-pom maker!