30"W X 24"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 31.875"W X 25.875"H] Color_White + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 10" x 30" or 30" x 10" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 20 5/8" width X 34 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 10" OR 10" x 22" duct opening (measured at the opening)

+ Product Details Size – 4"w X 12"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 22 5/8" width X 38 5/8" height

30"W X 24"H [Duct Opening] ALUMINUM RETURN GRILLE Easy Air Flow Linear Bar Grilles [Outer Dimensions: 31.875"W X 25.875"H] Color_White + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 10" x 30" or 30" x 10" is the size for the duct opening measurement only actual front end outer dimensions are approximately 20 5 8" width X 34 5 8" height