The 6" or 150mm deep Salvage or Reclaimed Sandstone Kerbstone or garden edging is the most popular product used for driveway edging or Kerbstone. 2" or 50mm is sunk into the ground with 4" peering above the ground level. One can bend the kerbs along a winding driveway or Flowerbed without cutting as they are approx. 12" or 300mm long on average. The edges of the kerbstone are worn and weather beaten, which makes them very child friendly.