Crushed Limestone Gravel
The 89 limestone is 3/8" in size and a 4 limestone is 1 1/2" - 2 1/2" in size. You can also purchase baserock limestone which has a mix of sizes often ranging between 1-3" with fines, making it a great base material. Make a visit to gravelshop.com to check the different crushed limestone sizes that you can use for your projects.