Crushed stone 5 – Sizes are from 1″ down to fine particles For road and paver base Crushed stone 67 – Sizes from 3 4″ down to fine particles For fill road and slab base Crushed stone 1 – Sizes are from 2″ to 4″ The largest of the crushed stone grades For larger jobs such a culvert ballast Crushed stone 8 – Sizes from