Builders Edge Rectangle Gable Vent - WhiteThese classically styled vents feature a slightly wider frame and subtle architectural details to elevate their seemingly simple design. Maximize ventilation and add a crisp, bold touch with high contrast color. Use with a wide range of siding materials. Square: Size: 12"x 12" Outside Dimensions: 14. 2"x 14. 2" Depth: 1. 75" Venting Area: 38 sq. in. Rough Air Opening: 6"x 6" Locking Positions: . 50", . 75", 1. 00", 1. 25" Rectangle: Size: 12" x 18";