Pattern Horizontal Hashmarks' short, vertical lines create a field of clean, geometric precision in regimental formation. This Horizontal Hash Marks Wallpaper measures approximately 20.5 inches wide by 33 feet long, covering About 56.4 square feet per roll. Manufactured on Sure Strip™, a unique high performance substrate, this ultra-easy removable wallpaper is guaranteed easy to install and easy to remove; simply use water to activate. Prepasted sure strip material; 20.5-in repeat, straight match; Washable and strippable; 20.5-in by 33-ft long roll; Covers about 56.4 square feet