The UNI paving stone was one of the first interlocking stone shapes produced and still provides the strongest interlock when installed in a herringbone pattern. Two sizes of edge stone complete this system and provide all the components necessary to ensure a professional instion
| Stone | UNI | UNI |
| Thickness of Stone - cm | 6 | 8 |
| Area/Stone-cm2 | 256 | 265 |
| Stone per cm2 | 39 | 39 |
| Weight/Stone-Kg | 3.50 | 4.70 |

