Contrary to what toothpaste commercials show, the amount of paste or gel needed on your brush for effective cleaning does not have to be a heaping amount. Simply squeeze a pea-sized dab of paste on the top half of your brush. If you brush correctly, holding the toothbrush at a 45-degree angle and brush inside, outside and between your teeth, the paste should foam enough to cover all of your teeth. Children under age 6, however, should be given a very small, baby pea-sized dab of toothpaste on their brush.