U-Channel posts for mounting signs are available in multiple sizes, ranging from 3 feet to 8 feet (3 feet, 4 feet, 5 feet, 6 feet, 7 feet, and 8 feet). Some sizes are available in lighter variety (Economy) while some are available as heavy duty (Municipal). Each post has pre-drilled holes measuring 3/8 inch in diameter, spaced out 1 inch apart in the center. We also offer Breakaway Sign Posts that can be easily replaced and the base reused after an accident.