#57 vs. #67 Crushed Stone: Key Differences Explained

Though similar in many ways, #57 and #67 crushed stones have slight differences in size and function that can make one more suitable than the other for specific projects. #67 stone is slightly smaller and more fine than #57. Understanding these differences helps you choose the right material for the job. You can also use our free aggregate quiz if you’re not sure either of these stones are what you’re looking for.

What Do the Numbers Mean in Crushed Stone?

The numbers associated with a stone have to do with their length. In the crushed stone industry, numbers like #57 and #67 refer to specific stone gradations set by the ASTM (American Society for Testing and Materials). These numbers correspond to the mesh size of a screen the material can pass through. For example, #57 stone passes through a 1″ screen but is retained on a ½” screen, while #67 stone passes through a ¾” screen and is retained on a ⅜” screen. This classification system helps standardize stone sizing across regions and ensures consistency in construction and landscaping applications. The accuracy of these grading standards can vary, often depending on how meticulous a supplier grades the material. For a more in-depth explanation of crushed stone numbers, watch this video.

What Is #57 Crushed Stone Used For?

#57 stone is one of the most versatile and widely used crushed stone products on the market. Thanks to its medium size—typically ranging from ½” to 1″—it allows for excellent drainage while still providing solid support and compaction. This makes it ideal for a wide range of residential and commercial projects, including:

• Driveways – A popular top layer for stone driveways due to its ability to lock in place.
  
  
• Drainage Systems – Used around French drains, foundation footers, and other drainage projects.
  
  
• Concrete Base Material – Often mixed with cement or used as a base layer under slabs and sidewalks.
  
  
• Landscaping – Commonly used as decorative ground cover or for erosion control.
  
  

To explore more applications, visit our #57 crushed stone product page or learn how to build a gravel driveway.

What Is #67 Crushed Stone Used For?

Since #67 stone is slightly smaller than #57, that makes it ideal for applications where a finer, more compact material is needed. The typical size range is around ¾” to ⅜”, which allows it to fill tighter gaps and create smoother finishes. While not quite as strong under heavy loads as #57, its finer size can be advantageous in:

• Thin Concrete Layers – Great for use in thinner slabs or when a smooth finish is needed.
  
  
• Walkways and Paths – Creates a tighter surface with fewer gaps than larger stone.
  
  
• Backfilling Pipes – Easier to shovel and spread, and reduces the risk of damaging pipe systems.
  
  
• Mixing with Other Aggregates – Often blended to improve overall compaction in layered construction.
  
  

Key Differences Between #57 and #67 Stone

While both stones offer solid drainage and compaction, the main difference lies in their size and how that impacts performance. #57 stone, being larger, allows for better drainage and is more effective under heavier loads—making it a go-to for driveways, retaining wall backfill, and heavy-use areas. On the other hand, #67 stone’s smaller size helps it compact more tightly, which can be better for walking paths, pipe bedding, or projects requiring a smoother finish.

If you’re unsure which material you want for your project, take our free aggregate quiz to find out. If you need an estimate for how much material you need, use our free crushed stone calculator to compare project requirements and estimate how much material you need. If you need more help, reach out to a Hello Gravel representative here.