Aftermarket Carrier 16 x 25 x 4 Size 15 3/4" x 24 3/4" x 4 5/16" MERV 11 Case of 3 Furnace Filters generally has a Nominal Size and an Actual Size printed on them. Actual sizes vary widely depending on Manufacturer / Brand for the same Nominal Size. If not sure, please measure the inside of filter cabinet to verify this actual size will fit. Manufactured In Canada Case of 3