In Germany, clinker bricks (German: "Klinkerziegel") are named according to the German Institute for Standardization's DIN 105. They differ between "full clinker" (KMz) with a density of and "high hole clinker" (KHLz) with a density of . Because of their low porosity, clinker bricks are inferior thermal insulators, compared to normal bricks. "Canal clinkers" are named according to the German Institute for Standardization’s DIN 4051. Clinkers are frost resisting and, thus are suited particularly for facades. The formats of the clinker stones are named according to the German Institute for Standardization’s DIN 1053. Base for the different formats is the "normal format" (NF) with length , width and height . For facade layouts architects also order clinkers produced in special dimensions.