24" x 10" Steel Fixed Bar Return Grille - Sidewall and Ceiling Fixed Blades + Product Details Size - Condensate Pump Accessories RG1620AL High Quality High quality

+ Product Details Size - 34"w X 14"h is the size for the duct opening measurement only

+ Product Details Size - 25"w X 34"h is the size for the duct opening measurement only

you can watch this informative video tutorial: How to Measure Your Vent Hole Before Ordering a Grille

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 25" OR 25" x 20" duct opening (measured at the opening)

+ How To Measure A Grille Overall Size:

24" x 10" Steel Fixed Bar Return Grille Sidewall and Ceiling Fixed Blades + Product Details Size Condensate Pump Accessories RG1620AL High Quality High quality + Product Details Size 34"w X 14"h is the size for the duct opening measurement only + Product Details Size 25"w X 34"h is the size for the duct opening measurement only