Fits most round patio and market umbrellas 11 Ft. in diameter, or 8 Ft. square. The Terrazzo series of furniture cover from Classic Accessories provides high-end style and protection at a value price. Features include: Rain-tie protective fabric - 600 x 300 poly/PVC - provides protection against rain, snow, sun, and dirt and won't crack in cold weather. StayOn elastic - elastic loops fit over legs to keep cover on during high winds and breezy conditions. Custom fit - elastic cord in the bottom hem for a fast and custom fit. Air vents - reduce inside condensation and wind lofting.