24" X 8" Pewter Cold Air Return Vent Cover / Grille Pewter Plated Steel Air Return Grill for 24" x 8" Duct Opening The overall faceplate dimensions are: 25.25" x 9.25" The fin spacing is 1/3" and the turnback is 3/16" (how far it sticks out from the wall) Only for wall use. NOT suitable for floor use.