Standard U-Channel Sign Post - 4' tall (2-1/8" Wide) Baked Enamel Posts, 3.0625" x 48" Use this 4' post for smaller signs. Posts are medium weight (1.12 pounds per foot). U-channel sign posts have 3/8" diameter, pre-drilled holes located at the top 30" of the post. Baked-on green enamel finish on these heavy steel posts, assure rust-free service.