Actual Dimensions: 20.75 x 20.25 x 5.25. Brand: Accumulair. 20x20x5 Philco BB2020 style whole house filters, specifically constructed to substitute for the original manufacturer Philco BB2020 filters. Fully built - no forming or combs needed. MERV graded to ASHRAE 52.2 test specifications establishing particle capture as good or better than the name brand Philco BB2020 air filters. Note: Example filter pic as shown is not to scale and is there to show design purposes. OEM names and Philco BB2020 part numbers are used for filter replacement purposes only.