10"x 10" (Duct Opening Size) 4-Way Stamped Face Steel Ceiling/sidewall Air Supply Register - Vent Cover - Actual Outside Dimension 11.75" X 11.75" If you measure outside or

If you measure outside or surface size

actual outside dimension is 14

actual outsize overall dimensions is 14“ wide by 10” high

The Listed size 12"x12" is for inside duct opening measurement

actual outside dimension is 9

10"x 10" (Duct Opening Size) 4-Way Stamped Face Steel Ceiling/sidewall Air Supply Register - Vent Cover - Actual Outside Dimension 11.75" X 11.75" If you measure outside orThe Listed size 10"x 10"is for inside duct opening measurement, actual outside dimension is 11. 75" X 11. 75" Stamped Face Steel Construction with 1 2" fin spacing for high air flow Four Way Air Flow deflection Design Multi shutter damper with easy handle to adjust desired amount of air flow Individually shrink wrapped with card board pad in the back for extra protection