Home / Aggregates / Limestone #9 Limestone #9 Limestone #9 is a gravel averaging 3/8-inch in size and angular in shape. It can be used for leveling (in place of sand) and under/around pavers. It is also widely used for walkways. SKU: agg-l9 Category: Aggregates Product ID: 29283 Description Description Gravel Calculator Inch Calculator Related products 2B Limestone Brown Mulch Mason Sand River Stone 1B | Pea Gravel