Standard size of brick and compressive strength of brick and types of bricks

Standard size  of brick and compressive strength of bricks type of bricks,

6cm 12 cm 24cm

A CLASS

B CLASS

C CLASS 

The compressive strength is calculated from the failure load divided by the cross-sectional area resisting the load and reported in units of pound-force per square inch (psi) in US Customary units or megapascals (MPa) in SI units.