12"W X 12"H [Duct Opening] 4-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 13.75"W X 13.75"H] Compatible With Duct 6in + Product Details Size –

+ Product Details Size – 14"w X 16"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 34 5/8" width X 14 5/8" height

Versatile Compatibility: Our ceiling grills aren't limited to just T bar drop ceilings

+ Product Details Size - 8"w X 16"h is the size for the duct opening measurement only

+ How To Measure A Grille Overall Size:

12"W X 12"H [Duct Opening] 4-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 13.75"W X 13.75"H] Compatible With Duct 6in + Product Details Size –+ Product Details Size 12"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are 13. 75" width X 13. 75" height. Design Individually adjusting curved blades for better air flow control. Screws Included High Quality Aluminum The premium durable aluminum will never rust and it will never wear through leaving the material with an elegant, beautiful, and smooth surface, adds a luxurious touch to any home.