12" X 8" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback For Flush Fit With Baseboard Work - White Color_R-8.0 Pink + Product Details Size –

+ Product Details Size – 26" x 30" or 30" x 26" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 38 5/8" width X 20 5/8" height -

Actual Filter Size – 27 3/4"w x 15 3/4" x 1"

+ Product Details Size – 20"w X 26"h is the size for the duct opening measurement only

12" X 8" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback For Flush Fit With Baseboard Work - White Color_R-8.0 Pink + Product Details Size –+ Product Details Size 12"w X 8"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 13. 75" Width X 9. 75" Height SEE BELOW IN DESCRIPTION How To Measure A Grille Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was just waxed. High Quality Easy unrestricted airflow for your HVAC system 7 8" margin turnback. Carefully Shrink Wrapped With cardboard backing to prevent damage in shipment