20" X 26" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 28 5/8"] w10h10 + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 24" Wooden Corner Baseboard Grille

actual front end outer dimensions are approximately 22 5/8" width X 12 5/8" height

+ Product Details Size – 32"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 26"w X 30"h is the size for the duct opening measurement only

+ Product Details Size - 26"w X 24"h is the size for the duct opening measurement only

20" X 26" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 22 5 8" X 28 5 8"] w10h10 + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 24" Wooden Corner Baseboard Grille actual front end outer dimensions are approximately 22 5 8" width X 12 5 8" height