The ASTM D1814-70 (2021) standard specifies a standard test method for the measurement of the thickness of leather units. The standard is applicable to a variety of leather products, including footwear, leather bags, clothing, etc., and aims to provide an accurate and consistent way to measure the thickness of leather. The standard details the test method, equipment requirements and operation steps to ensure the Reliability and repeatability of the measurement results. In addition, the standard also includes the preparation requirements of leather samples and precautions during measurement to avoid factors that affect the Measurement accuracy. Through this standard, it can provide a unified quality control basis for the leather industry to ensure that leather products meet the specified thickness standards.