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, measuring approximately 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.