Actual size is 20.25 x 25.38 x 5.25. Accumulair brand: 20x25x5 Electro-Air FS2025 replacement whole house filters, exactly built to substitute for the original brand Electro-Air FS2025 air filters. Completely built with no forming or combs required. MERV rated to ASHRAE standards ensuring particulate filtration to the level of the name brand Electro-Air FS2025 filters. Notice: The example air filter image displayed is not true to size and is there to show design purposes. Name brands and Electro-Air FS2025 identifier included for air filter replacement identification.