12x12x1 Actual Sizes

Not sure of your actual size? Check the side of your current air filter.

11 1/2 x 11 1/2 x 3/4 (11.5 x 11.5 x 0.75)

11 3/4 x 11 3/4 x 3/4 (11.75 x 11.75 x 0.75)