30" X 12" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 32 5/8" X 14 5/8"] Ceiling + Product Details Size - RG1620AL Quality Packaging carefully packaged 8 Feet Long

+ Product Details Size - 25"w X 18"h is the size for the duct opening measurement only

+ Product Details Size - 14"w X 32"h is the size for the duct opening measurement only

5" - SEE BELOW IN DESCRIPTION HOW TO MEASURE A GRILLE

Actual Filter Size – 13 3/4"w x 13 3/4" x 1"

30" X 12" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 32 5 8" X 14 5 8"] Ceiling + Product Details Size RG1620AL Quality Packaging carefully packaged 8 Feet Long + Product Details Size 25"w X 18"h is the size for the duct opening measurement only + Product Details Size 14"w X 32"h is the size for the duct opening measurement only