How many sizes of old bricks are there?

The technical label of red bricks in the market is generally No. 75~ 100, that is, the standard red brick is 240× 1 15×53MM, which is dark and bright. Generally, the sizes of single red brick used in China are generally 60×240× 10mm, 240× 15× 90, 240× 16×5438+05×95mm, 205×55×96MM and so on, which are relatively common.