Two-Way Plastic Side Wall/Ceiling Register in White 10" w X 8" h for Duct Opening Width vs Height The first

Width vs Height The first measurement in a return grille size is the width(horizontal measurement)

Actual outside dimension is 12"

The Listed size 6"x 6" is for inside duct opening measurement

Effortless Airflow Control: Our functional floor register is equipped with an easy-to-use airflow control dial

helping guard against abrasion

Two-Way Plastic Side Wall/Ceiling Register in White 10" w X 8" h for Duct Opening Width vs Height The firstFirst thing to know about size selection: take the vent cover off the wall or ceiling. Measure the duct opening where the vent can fit in. Use the measurement to determine right size to buy. This product has listed size 10w X 8h is for duct opening measurement only, actual outsize overall dimensions is 11. 75 wide by 9. 75 high. If your duct opening size is 10 x 8, this is the right size and will fit in well. If you measure outside or surface size,