THIS FILTER IS 3"X5 " IF YOU NEED THE 4" X 6" MODEL YOU NEED 86889 * Fits Most Kenmore Canisters using a HEPA Filter * Also fits Panasonic canisters using HEPA Filter * Filters 99.7% of ALL Dust down to .3 Microns * Filter should be replaced at least once a year, if you have severe allergies every six months