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"	88.9	X
3"	76.2	X	.
2 1/2"	63.5	X	X
2"	50.8	X	X	.
1 1/2"	38.1	..	X	X	.	.
1"	25.4	.	..	X	X	X	.
3/4"	19.1		.	..	X	X	X	.
1/2"	12.7			..	..	X	X	X	.	.
3/8"	9.5			.	.	X	X	X	X	X	.	.
3/16"	4.8					.	.	.	X	X	X	X
3/32"	2.4								.	X	X	X
1/16" - 0	0-1.6								.	..	..	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.

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