What particle size defines gravel?

Gravel is typically defined by its particle size, which commonly falls within a specific range. The definition you provided highlights a crucial aspect: gravel is composed of particles that are generally larger than #4 sieve (which corresponds to approximately 4.76 mm or 0.187 inches) and smaller than 3 inches. This classification is essential in various applications, such as construction and drainage, where knowing the right size of aggregate is vital for ensuring proper stability and drainage characteristics. By establishing this size range, engineers and construction professionals can determine the most appropriate materials for their projects, ensuring they meet industry standards and practical requirements for strength and compaction.