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.