20x25x5 (20.25x25.38x5.25) MERV 11 Aftermarket Five Seasons Replacement Filter (2 Pack) Five Seasons filter part # MU2025 Nominal size 20 x 25 x 5. Actual size (H) 20 1/4 x (W) 25 3/8 x (D) 5 1/4. Package contains 2 filters. This is an aftermarket filter.