Stone columns built around porch or pergola posts are normally 2′ to 3′ tall, 16” to 18” square capped with flagstone on a concrete footer.
Sitting benches are typically 18” tall, 14” wide seating tops. Varying lengths and shapes from curved to straight or “L” shaped.
Stone walls depends on height and width specifications, basic construction as sitting walls.
Stone Columns Gallery
Stone Sitting Benches and Walls