Gravel Size Gradation Chart

Which Size Gravel Stone to Choose

The chart below is a guide to the stone size range of our gravel and decorative products:

Size Stone Pea Stone Screenings
US MM #1 #2 #4 #5 #57 #67 #7 #8 #89 #9 #10
4"101.6.
3 1/2"88.9X
3"76.2X.
2 1/2"63.5XX
2"50.8XX.
1 1/2"38.1..XX..
1"25.4...XXX.
3/4"19.1...XXX.
1/2"12.7....XXX..
3/8"9.5..XXXXX..
3/16"4.8...XXXX
3/32"2.4.XXX
1/16" - 00-1.6.....X

(X) = Stone largely consists of this size
(..) = Stone can consist of up to 15% of this size
(.) = Stone can consist of up to 10% of this size
Each stone gradation can contain up to 10% upper and lower grades and some fine material (sand).

In the Upper Range of Our Stone Sizing — 4" down to 2"

This covers products such as Rip Rap (can be significantly larger, depending on the chosen product), Large Beach Pebbles, and Red Rock. Their weight makes them a sturdy and excellent decorative stone, especially for creating borders and outlining gardens and driveways.

In the Mid Range of Our Stone Sizing — 2" down to 1/2"

This covers products such as Granite and Limestone Gravel, along with River Rock and Recycled Crushed Concrete — all excellent choices for driveways, with similar functional properties and differing aesthetics.

In the Lower Range of Our Stone Sizing — 1/2" down to fines (industry term for sand, stone dust, and tiny particles)

Products in this range are notably more compactible and suited for creating a base layer — products such as Crusher Run, Screenings, Sand, and Soil.

Recommended Stone Sizes for Common Applications

  • For support of heavy vehicles — choose our #3 or #4 stone
  • For standard driveways — choose our #57 or #67
  • For more decorative driveways — choose our 1/2" to 2" river gravel
  • For driveways/paths more comfortable to walk upon — choose our #89