#57 Crushed stone– Sizes of about 3/4″. Works for concrete and asphalt mix, driveways, decorative landscaping, and French drains. #3 Crushed stone – Sizes range from 2″ to 4″. Great for larger jobs, such as new driveways, muddy areas, construction, and drainage. #21A/CR-6 Crushed stone– Made with a mixture of stone dust and #57 gravel.