Visible side is cut and the two side tops are natural surface or sawn. The blocks with natural surface have variable height of 8-14cm or 15-20cm, with recess of 12-14, while the sawn surface is 8, 10 or 12/15cm high with recess of 6-8 and 6-10cm. Both Blocks and Walling stones are used for cladding supporting walls, barriers, facades or parts thereof. Walling stones differ from Blocks because of a greater recess of 15-25cm.