Actual size is 15.5 x 24.5 x 3.75. Brand: Accumulair. 16x25x4 White-Rodgers FR1400M-111 compatible whole house filters, exactly constructed to replace the OEM White-Rodgers FR1400M-111 filters. Completely constructed - no forming or combs required. MERV classified to ASHRAE specs assuring operation to the level of the original brand White-Rodgers FR1400M-111 air filters. Notice: The sample air filter picture as displayed is not the actual dimensions and is shown for construction purposes only. Name brands and White-Rodgers FR1400M-111 identifier shown for air filter substitution identification only.