22" X 32" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 24 5/8" X 34 5/8"] w14h14 + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 34"w X 10"h is the size for the duct opening measurement only

+ Product Details Size - 16"w X 36"h is the size for the duct opening measurement only

875" width X 21

+ Product Spec Sheet

+ Product Details Size - 36"w X 18"h is the size for the duct opening measurement only

22" X 32" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 24 5 8" X 34 5 8"] w14h14 + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 34"w X 10"h is the size for the duct opening measurement only + Product Details Size 16"w X 36"h is the size for the duct opening measurement only