Fits many offset/cantilever Umbrellas up to 13 feet diameter. Heavy Duty 600D polyester with waterproof inner layer; Zipper closure. Due to wide variety of offset umbrella types it is important to verify appropriate fit. Email us with questions. Actual size of cover is 27" wide at top, 31" wide at bottom, approximately 96" tall and with a zipper approximately 72" long. You will require a lifting pole such as a broom stick to reach high.