This 4" bollard cover is designed to fit posts with a diameter of 4 13/16" (4.8125") and is available in two heights: 52" or 60". It comes in a selection of 10 standard colors, and if you require a custom length, please specify your specifications during checkout. Additionally, there is the option for custom colors and logos, which can be discussed with us for more details. The cover is made through a rotational molding process, ensuring its strength and durability for long-lasting protection.