16X25X5 (15.38x25.5x5.25) MERV 11 Five Seasons Replacement Filter (2 Pack) Five Seasons filter part #MU1625 Nominal size 16" x 25" x 5" (Actual size 15 3/8" x 25 1/2" x 5 1/4") Filters out 97% of airborne particles.