Sign posts are pole-like structures used to mount signs. Signposts help you display signs which can be informational, directional, regulatory, or identificational. Posts are useful for areas where a mounting surface is unavailable. Signs posts are necessary to make your signs more noticeable. Mounting signs on a post gives them height and more visibility to the message on the sign from a distance. Sign posts are mostly made of steel or wood. Plastic sign posts have also become popular these days because they are lightweight. For smaller signs, both posts metal and wood posts will do the job. But for larger signs, metal posts would provide a lot more strength and support. Metal sign posts can be round, U-channel, I-beam, or square tubes, and are either galvanized or ungalvanized.