br 3D Signs, Dimensional Signs, 3D Signage, Dimensional Signagebr br Have you ever looked at the name of a business outside of a building, and found the sign to be extremely drab? In most cases, the worst looking signs are ones where all the letters are flat. This is just one of many reasons why more business owners are opting for 3D letters or 3 dimensional letters. As an added bonus, if you decide to have a lighted sign, the individual letters may use less electricity than a larger board with a wider surface area.