Measurements: 20-3/8 in. x 20-3/8 in. Finish: White Primer. Inside Diameter: 4 in. Fits Canopies Up To: 5-3/4 in. Projection: 1-1/4 in. Material: Polyurethane. Brand: Ekena Millwork. Hand Painted Option To choose one of our pre-made finishes: Click Here. For a custom made finish: Click Here.