12" X 24" or 24" x 12" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 13.75 X 25.75] Galvanized Steel + Product Details Size –

+ Product Details Size – Stick-on collar is 16" and it is compatible with duct 16"

+ Product Details Size - 24"w X 8"h Is The Size For The Duct Opening Measurement Only

+ Product Details Size - 22"w X 14"h X 2"d (for duct opening measurement only)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 26" or 26" x 10" duct opening (measured at the opening)

12" x 8" Decorative Wood Air Vent HVAC Duct Cover Grille - Polished Finish Red Oak Wood - 2-Way Air Direction

12" X 24" or 24" x 12" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 13.75 X 25.75] Galvanized Steel + Product Details Size –+ Product Details Size 12"w X 24"h or 24" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" width X 25. 75" height. High Quality High grade steel construction meant for high foot traffic areas. Installation Location Floor. Design Easy drop in installation. Powder Coat Finish Smooth, shiny, scratch resistant, with no sharp edges. Looks like it was just waxed. Quality Packaging Carefully