Actual dimensions are 19.75 x 20.75 x 4.88. Accumulair brand 20x20x5 Ultravation 90-016 compatible whole house air filters, exactly constructed to be an alternative to the OEM Ultravation 90-016 air filters. Completely assembled with no forming or combs required. MERV rated to ASHRAE standards establishing particle capture as good or better than the OEM Ultravation 90-016 air filters. Note: The sample air filter pic shown is not true to size and is displayed for configuration purposes only. Company names and Ultravation 90-016 part numbers displayed for air filter replacement purposes.