Nominal size: 16x25x2, actual size: 15 1/2" x 24 1/2" x 1 3/4" comparable to 3m filtrete mpr 1000 to 1200 micro allergen defense comparable to honeywell allergen plus fpr 8 fights lint, dust mites, mold spores, pollen, pet dander, dust, and smoke. change frequency 60-90 days, made in the usa.
