16×20 ft. 13 oz. per sq. yd., 15 mil, waterproof, UV protected, tear resistant. This tarp comes with grommets installed in all four corners. It does not have other grommets along the sides, only the four grommets in the corners. The corners are reinforced, and the grommets are rolled rim/spur for additional grip. The grommet inside diameter is 3/8″.