Thickness of concrete pavers varies according to the application:

Pavers made in the United States should meet or exceed the requirements established in the American Society for Testing and Materials (ASTM) C 936, Standard Specifications for Solid Interlocking Concrete Paving Units.

• Here are the requirements for this standard:
• An average compressive strength of 8,000 PSI
• An average absorption no greater than 5%
• Resistance to at least 50 freeze-thaw
  cycles with average material loss not exceeding 1%
• Conformance to abrasion resistance tests