20"W X 32"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 21.75"W X 33.75"H] w18h18 + 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

this grill will provide the design aesthetic you're looking for

+ Product Details Size - 25"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 25"w X 24"h is the size for the duct opening measurement only

Looks like it was just waxed

20"W X 32"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 21.75"W X 33.75"H] w18h18 + 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 this grill will provide the design aesthetic you're looking for