6" X 10" Or 10" X 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 11.75] Height_24in + Product Details Size - Suitable for all AC 8in diameter 12125SDCLNGBX

+ Product Details Size - 8"w X 34"h is the size for the duct opening measurement only

+ Product Details Size – 32"w X 14"h is the size for the duct opening measurement only

+ Product Details Size – The size 30-gauge stick-on collar is 9" and it is compatible with duct 9"

Actual Front End Outer Dimensions Are 12" Width X 4" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

6" X 10" Or 10" X 6" Heavy Duty Floor Grille Fixed Blades Air Grille Brown [Outer Dimensions: 7.75 X 11.75] Height_24in + Product Details Size Suitable for all AC 8in diameter 12125SDCLNGBX + Product Details Size 8"w X 34"h is the size for the duct opening measurement only + Product Details Size – 32"w X 14"h is the size for the duct opening measurement only