If you are expecting a sail the size of the one pictured, you will be in for a big surprise. While 12 ft sounds sizeable, it really isn't. The sail came wadded up in the package, so it was really wrinkled. The material is pretty heavy, but you'll have to hang it to begin getting the wrinkles out. (You provide the rope to hang it.) This would work fairly well to cover a child's sandbox or a small area, but it really won't do a whole lot to provide shade over an outdoor dining table or patio. Before you order, I'd suggest laying a tape measure out so you can see exactly how much area a 12x12x12 triangle will cover.