Size: our column wrap for porch have proper size, the inside diameter is approx 4inches / 102mm, outer diameter is approx 5.79inch / 147mm, height is approx 1.43inch / 3.64cm, suitable for posts in 4x4inches; Please confirm the size before purchase Sufficient quantity will meet your using needs, and you can share with your family Easy to Use: our post sleeve is easy and to use, there is no need to remove the railing and end can be easily clipped together to snug column, not easily separated Widely Applicable: you can use these deck post bases on various occasion, they matching well with the surrounding decorations, add more, to make decorations look more elegant and Durability: these post base cover from ABS, waterproof and sturdy, strong and durability, with smooth and fine workmanship, not easy to break or fade