Actual size is 15.88 x 24.88 x 4.38. Accumulair brand 16x25x5 Honeywell F25A1043 substitute whole house air filters, specifically designed to be an alternative to the original brand Honeywell F25A1043 filters. Fully box-formed - no forming or combs required. MERV graded to ASHRAE 52.2 test grades assuring performance as good or better than the name brand Honeywell F25A1043 filters. Notice: The example filter picture as displayed is not to scale and is included to show style only. Name brands and Honeywell F25A1043 part numbers are included for air filter substitution purposes only.