Blade-shaped flags, (aka Wind Blades, Flutter Flags , Bow Flags & two million other names) offer a pleasing shape that handles vertical designs particularly well. The outside edge of the flag will flutter nicely in the wind, so Blade Flags tend to call attention to themselves. Design criteria drive most of the practical decision making when it comes to flag shape. The rest is up simply a matter of personal preference. There really is no “best” flag shape.