The best way to ensure you get the correct size air filter is to look at your existing air filter. Most current air filters will have the size on the air filter or it will have a part number. If your existing air filter doesn’t have the dimensions listed on the side, you can measure it yourself. Measure your air filter for length, width and depth. These dimensions are called actual dimensions. Then you’ll need to round each actual dimension up to the nearest inch to get your nominal dimensions which you can then find by searching on our air filter finder.