Product details:
Nominal Size: 16 x 25 x 5 H, Actual Size: 15 3/4 x 24 3/4 x 4 3/8 (15.75 x 24.75 x 4.38) Attracts indoor allergens, dust, pollen and other airborne contaminants. Hypoallergenic and antimicrobial pleated electrostatic filter material Nordic Pure recommends changing 5" air filters every 3-6 months Made in the USA!