22"W X 12"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 23.75"W X 13.75"H] 18" Diameter + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 34"w X 22"h is the size for the duct opening measurement only

+ Product Details Size - 28"w X 14"h is the size for the duct opening measurement only

4" X 10" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated

European: EN 10270-1-SM

+ Product Details Size - 26"w X 6"h is the size for the duct opening measurement only

22"W X 12"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 23.75"W X 13.75"H] 18" Diameter + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 34"w X 22"h is the size for the duct opening measurement only + Product Details Size 28"w X 14"h is the size for the duct opening measurement only