Heavy-duty tarps- 14X14 Mesh Count, 12 Mil Thickness, 6 oz per square yard, aluminum grommets every 18 inches with rope reinforced corners and eyelets. All of our heavy-duty canopy replacement tarps are weather-proof- providing 100% UV Protection and Shade. Every tarp is Waterproof, Mildewproof and Rotproof. Standard tarps fit to the frame edge, leaving a 3-4" gap between the frame pole and the edge of the cover. Actual tarp size is 12' x 20' (Finished Dimension 11'6 X 19'6"). The two extra feet is needed to cover the high center angle.