US Sizes US/Imperial bar sizes give the diameter in systems of 1⁄8 inch (3.2 mm) for bar sizes # 2 through # 8, so that # 8 = 8⁄8 inch = 1-inch (25 mm) diameter. The cross-sectional location, as offered by πr ², exercises to (bar size/9.027) ², which is approximated as (bar size/9) ² square inches. For instance, the area of # 8 bar is (8/9) ² = 0.79 square inches. Inland Concrete Products is a concrete rebar chairs distributor in southern California. Inland Concrete Products manufactures slab bolster wholesaler. ICP designs plastic spacers. Driving directions to Inland Concrete: https://www.google.com/maps/dir/?api=1&origin=33.4403680863014,-116.747760545962&destination=Inland+Concrete+Products Read our latest post: https://local.google.com/place?id=676187820448728623&use=posts&lpsid=4987771889468039697 https://plastic-rebar-chairs-for-concrete.business.site/posts/4987771889468039697