The ASTM D1813-13 (2023) standard specifies a standard test method for the measurement of the thickness of leather samples. This method is suitable for thickness determination of various leather materials and is widely used in leather quality control, production management and product inspection. The standard describes in detail the instrumentation and equipment used for measurement, the operation steps, and the treatment methods of the samples to ensure conformity and accuracy during the test process. Through this standard, users can effectively evaluate the thickness of leather, and then judge its suitability and performance, such as durability, comfort and Appearance. This test method provides important technical support to the leather industry, tanners and consumers, helping to ensure the mass and compliance of leather products.