Amazon.co.jp: Concrete Blocks Basic Set of 2, JIS Factory Product, Type C, Thickness 3.9 x Width 15.4 x Height 7.5 inches (100 x 390 x 190 mm), Kyoto Ujikawa Block Industry : DIY, Tools & Garden
Table 2-1. Nominal height of concrete-block walls
TYPICAL SIZES AND SHAPES OF CONCRETE MASONRY UNIT
Concrete masonry unit, Concrete block dimensions, Cinder block