Actual size is 15.63 x 24.13 x 4.88. Accumulair brand 16x25x5 Ultravation 91-002 compatible whole house filters, exactly designed to replace OEM Ultravation 91-002 filters. Completely assembled so no assembly or combs required. MERV rated to ASHRAE specs assuring particle filtration equal to the original manufacturer Ultravation 91-002 filters. Photo: The sample air filter pic as shown is not to scale and is there to show style purposes only. Company names and Ultravation 91-002 part numbers included for air filter replacement identification.