A rubber grommet is a flexible piece that is collared in order to keep them in place within a hole. These holes are necessary for the purpose of hoses, piping, wiring, and airlines, etc. They act as a mechanical buffer between metal and another component, which helps the component get rubbed against the metal causing damages. High-quality materials like EPDM, Slicone, and PVC can be used to manufacture rubber grommets. There are many rubber grommet sizes that can be bought and used according to your product. Rubber grommets come in various sizes and shapes that can be rounded, long, oval, etc. If you want to know the rubber grommet sizes, you will have to measure the panel. Measure the thickness of the panel and the size of the hole where the grommet will be installed. This will help you to know the thickness of your grommet and its diameter. The exact measurements will help you to determine which rubber grommet sizes should be used. Edge grommets can be manufactured in a variety of sizes and lengths. They are used to protect the lines as well as cable. Strain relief grommets are also made up of rubber and plastic. They are designed in different sizes that are used to remove pressures caused by twisting and pulling. You can also make a grommet hole of any size. Sizes are generally listed as a measurement of diameter.