Fits 24x14 Duct Opening Stamped Steel Return Air Grille Vent Cover Grille for Sidewall and Ceiling in White Surface Dimensions: 25.75"W X 15.75"H (24" W x 14" H Duct Opening) The Listed size 10"x 3"

The Listed size 10"x 3" is for inside duct opening (the hole) measurement

buy a 20x14 grille

The Listed size 16"wx20h" is for inside duct opening measurement

Select the listed size that match the duct opening size

The Listed size 12'' X 12'' is for inside duct opening measurement

Fits 24x14 Duct Opening Stamped Steel Return Air Grille Vent Cover Grille for Sidewall and Ceiling in White Surface Dimensions: 25.75"W X 15.75"H (24" W x 14" H Duct Opening) The Listed size 10"x 3"The Listed size 24"x14" is for inside duct opening measurement, actual outside dimension is 25. 75"x15. 75" Stamped Face Steel Construction with 1 2" fin spacing for high air flow applications. Screws are included for easy installation White Powder coating with matte finish Individually packed with cardboard box for ultra protection