Truaire C123RW 10X06(Duct Opening Measurements) 3/4-Inch Margin Turnback 1/3-Inch Space Fin Floor Return Grille 10-Inch by 6-Inch Floor Baseboard Register, White Heavy gage all steel construction Model Size Indicates Duct Opening Measurements not Wall Opening Measurements. High quality steel components , no plastic High quality powder coated The actual face size is 11.75-inch in width and 7.75-inch in height.