The thickness of a diamond cutting blade can vary depending on its intended use and the manufacturer. However, in general, diamond cutting blades can range in thickness from about 0.05 inches (1.3 millimeters) to 0.25 inches (6.35 millimeters) or more. Thinner blades are often used for precision cutting applications, while thicker blades are typically employed for heavier-duty cutting tasks. The specific thickness of a diamond cutting blade may also depend on factors such as the diameter of the blade and the material being cut.