Nordic Pure 21_1/2x24x1ExactCustomM7-6 MERV 7 AC Furnace Filters, 6 Piece Actual Size: 21 1/2 x 24 x 3/4 Exact (21.5x24x0.75) This item is made to the exact size listed above. Please measure your current filter and compare sizes before you order MERV 7 media is ideal for normal air filtration and will help those with mild allergies Hypoallergenic and antimicrobial pleated electrostatic filter material Made in the USA