Actual dimensions are 19.75 x 24.25 x 4.75. Accumulair brand, 20x25x5 BDP P101-2025A substitute whole house filters, exactly built to replace original brand BDP P101-2025A air filters. Completely built so no assembly or combs required. MERV graded to ASHRAE 52.2 test standards assuring particle capture to the level of the original brand BDP P101-2025A air filters. Note: The example filter picture as shown is not true to size and is shown for design purposes. Trade names and BDP P101-2025A P/N are used for filter substitution identification.