Abstract: A corrugated paperboard corner post as utilized for packaging in a shipping container is formed by folding over a portion of corrugated, the upper and lower portions of the corrugated being divided into three panels each by slit score lines extending the length of the corner post, and gluing the outer panels of the upper and lower portions together. The corner post is initially formed in a flattened configuration to facilitate its shipment and handling in bulk and may be quickly and easily re-configured into its operable orientation by pushing both edges together and causing the panels to fold about their score lines.