When purchasing a grommet, you need to be aware of the grommet rubber sizes if you don’t want to make a mistake and end up with a product that you cannot use. There are two main ways that you can do this and the most common one is to measure the panel or the hole where the unit will be installed. You need to determine several things about this so that you make the right choice. First, you will need to know the thickness of the panel where the grommet will be placed, the size of the hole that needs to be filled, as well as the size of the cord, cable, or other objects that will be put through the opening. This way you will find out how thick the unit needs to be, as well as the diameter that it needs to have. 

There is another way that you can do this, and that is by measuring the unit itself. This is both a good and a bad option since you will still need to have the right dimensions for the opening that needs to be filled by the grommet. You can make the hole depending on the grommet you’ve chosen, but since there are a lot of different grommet rubber sizes, you may want to start with the panel measurement first, and then purchase the right unit for the job. We can help you find the right size grommet for your needs depending on the size and thickness of the hole in the panel. 

The standard grommet rubber sizes can range between ¾ inches and they can go up to twelve inches, but in some cases, you can request a special size that can be custom made for you. Remember that you need to pay attention to the type, thickness, and design of the unit itself, along with the outside and inside diameter. There are also solid units that don’t have a hole in them, so they are only used for sealing.