Actual Size: 15.88 x 19.75 x 4.38. Accumulair brand, 16x20x5 Honeywell FC35A1035 substitute whole house air filters, exactly built to substitute for the original brand Honeywell FC35A1035 filters. Fully constructed so no forming or combs needed. MERV graded to ASHRAE grades establishing function to the level of the OEM Honeywell FC35A1035 filters. Note: The example filter picture as displayed is not true to size and is there to show style purposes. Brand names and Honeywell FC35A1035 P/N used for filter replacement purposes only.