Set content and size: The set (4.17 * 3inch) contains four finger toothbrushes (0.9 * 2inch in four colors) and a tear-stained brush (0.9 * 4.13 inch, Purple) .How to use:for Thin Thick fingers-just add some water! - Add a few drops of water, and the silicone swells up, making your fingers bigger and smaller -- it won't slip out of your pet's mouth! Scope of application: cat, dog's teeth, tear stains, Chin and pet tableware cleaning. After-sales Service: If you have any questions, or if you are not satisfied for any reason, please contact us, we will replace or refund you in full.