22" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter white + Product Details Size -

+ Product Details Size - 12"w X 12"h is the size for the duct opening measurement only

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

but you will appreciate the benefits over the period of time

+ Product Details Size – 20"w X 12"h is the size for the duct opening measurement only

22" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter white + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 28" OR 28" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 27. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum