Actual size is 19.75 x 20.75 x 4.88. Accumulair brand, 20x20x5 Trion Air Bear Supreme replacement whole house air filters, specifically designed to replace name brand Trion Air Bear Supreme filters. Completely constructed with no assembly or combs needed. MERV rated to ASHRAE 52.2 test specifications assuring particle capture equal to the original manufacturer Trion Air Bear Supreme air filters. Photo: The example filter pic as displayed is not true to size and is shown for configuration only. Brand names and Trion Air Bear Supreme identifier included for air filter style identification only.