Actual dimensions are 19.75 x 24.25 x 4.75. Accumulair brand, 20x25x5 Ultravation 90-027 substitute whole house filters, specifically built to replace original brand Ultravation 90-027 filters. Completely assembled - no forming or combs needed. MERV graded to ASHRAE 52.2 test specifications ensuring particle capture as good or better than the original brand Ultravation 90-027 air filter. Note: Sample air filter picture displayed is not to scale and is there to show configuration only. Name brands and Ultravation 90-027 part numbers are used for air filter style identification use.