Accord White Return Air Grilles come in a painted white finish and are designed for use in the wall or ceiling. This grille comes with screws for installation and can be installed within seconds! This grille has a side depth of 5/16" from the wall and has fins spaced 1/2" apart. The listed size of 16" x 25" is based off the hole opening size and has an overall dimensions of 17 3/4" x 26 3/4". To order, measure the existing hole opening in your wall or ceiling and base your order off that.