bronze paving stone 175x88x100 The bronze paving stone can be made in any size and shape to fit other paving stone formats used in the specific environment. At the moment, the formats shown below of bronze paving stones have been developed for use together with natural or concrete paving stones: 100x100x100mm this format accords to the format of natural paving stones 175x88x100mm this format accords to the format of natural paving stones, and also the format of the Siena system, made by Starka, Sweden. See next page. 175x175x80mm this format accords to the Siena system, made by Starka, Sweden. See next page.