Actual Size: 19.75 x 24.25 x 4.75. Accumulair brand: 20x25x5 Trion Air Bear 255649-102 substitute whole house filters, specifically engineered to be an alternative to the name brand Trion Air Bear 255649-102 filters. Completely box-formed so no assembly or combs needed. MERV graded to ASHRAE 52.2 test specs assuring particle capture to the level of the name brand Trion Air Bear 255649-102 filters. Photo: The example air filter picture displayed is not the actual dimensions and is there to show design purposes. Company names and Trion Air Bear 255649-102 part numbers are listed for filter substitution identification purposes only.