Crushed Stone and Gravel Sizes, Chart and Grades
Crushed stones #2: ½″ to 2-2/2″ wide. These crushed rocks measure 1-1//2 to 2-2/2 inches, and they are not a popular category. Most vendors don't have them. Some of the uses of number 2 gravel include the following: Large construction jobs, filling large holes, railroad ballast, or making culvert ballast.