What Size Gravel for Driveway?
Quick Answer
Use three layers: #3 stone base (4 inches), #57 middle (4 inches), and #8 or crushed limestone top (2-3 inches).
A well-built gravel driveway uses three layers of progressively smaller stone:
Base Layer (4 inches)
Use #3 stone (1-2 inches) or #4 stone (1.5-3 inches). These large angular stones create a stable foundation and won't sink into soft soil. A geotextile fabric under this layer prevents the stone from migrating into the subgrade.
Middle Layer (4 inches)
#57 stone (3/4 to 1 inch) is the standard choice. It fills the gaps in the base layer, adds stability, and provides a transition to the finer top layer.
Top Layer (2-3 inches)
#8 gravel (3/8 to 1/2 inch) or crushed limestone creates a smooth driving surface. Some homeowners prefer #411 (a blend of #57 stone and stone dust) because the dust fills voids and compacts into a very firm surface.
What to Avoid
Avoid using pea gravel or river rock for driveways — their rounded shape means they never lock together and will constantly shift under tires, creating ruts.
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