Gravel Sizes Explained: Which Size Do You Need?
From fine chips to large drainage stone, matched to the job
Why size matters
Gravel size affects drainage, compaction, walkability and appearance. A size that compacts well into a stable base (generally requiring a mix of particle sizes) is a poor choice for a free-draining French drain, and a large, angular drainage stone makes an uncomfortable walking surface for a garden path.
Common categories
- Fine gravel/chips (roughly under 3/8 inch): decorative surface topping, some pathway use
- Medium gravel (roughly 3/8 to 3/4 inch): common general-purpose and driveway surface stone
- Larger drainage stone (roughly 3/4 inch and up): French drains, drainage layers, larger decorative stone
- Crusher run / road base (a graded mix of sizes down to fines): compacts into a stable structural base layer
Match the size to the job, not just the look
A driveway surface benefits from a size that compacts and stays relatively stable underfoot and under tires, while a drainage application specifically wants a clean, single-size stone with minimal fines so water can move freely between the particles. Checking your specific supplier's naming and sizing (which varies regionally) against your project's actual functional needs is more reliable than picking by appearance alone.