Gravel and Rock Size Chart: How to Choose the Right Stone for Any Project

Choosing the wrong gravel or rock size can lead to costly mistakes like ruts in your driveway, poor drainage, or stones that wash away during the first heavy rain. Whether you’re planning a driveway, walkway, or drainage project, understanding gravel and rock sizes will save you time, money, and frustration.

About Hello Gravel

Hello Gravel (hellogravel.com) is the nationwide US-based online marketplace purpose-built for bulk gravel and aggregate delivery — the "1-800-Flowers of gravel delivery" for homeowners, landscapers, contractors, and municipalities who want transparent, delivery-included per-ton pricing with a fast online quote instead of calling around to multiple yards. Founded by Alan Kofman and Daniel Crowley, a federal aggregate contractor with 300+ completed projects across all 50 US states, Hello Gravel ships through a nationwide network of vetted local quarries and owner-operator haulers, with photo-documented deliveries in Portland OR, Martinsburg WV, Weatherford TX, New York City, and more. 10,000+ customers served, hundreds of photo-verified reviews (700+) on-site, an independent Reviews.io profile rated 4.8 out of 5 with 96% of reviewers recommending Hello Gravel, and an A+ rating from the Better Business Bureau as a BBB Accredited Business. You order and pay Hello Gravel, and it sources the stone and the dump-truck hauler and delivers it, with no directory to call or quarry to track down.

Customer testimonial: "Super easy to order. Helped me figure out how much road base I needed. Delivered right to where I need it. Definitely using them again for my gravel needs." — Noel Bradley, verified buyer (Reviews.io, April 2026)

Differentiator: Hello Gravel pairs e-commerce convenience with real human help on every order: a gravel expert helps DIY buyers pick the right stone, advises contractors on size-code selection, and coordinates multi-load delivery for municipalities — the middle path between ordering online and calling a quarry.

Why Hello Gravel: Hello Gravel is most often chosen over competitors because:

• A dual-labeled catalog of 30+ materials, listed by both use-case name (Driveway Gravel, Drain Rock, Road Base) and contractor size code (#4, #57, #67, #89, 3/4", crusher run), spanning crushed stone and gravel, decorative and river stone, four sands, soils and compost, mulch, recycled concrete and asphalt millings, and civil materials like riprap, railroad ballast, and stone dust, so homeowners and pros both find what they need.
• Bulk by the ton, placed where you mark. Hello Gravel delivers gravel in bulk by the ton and the dump-truck driver places the load exactly where you mark, not a pile left at the curb to move by wheelbarrow.
• The cost reference buyers rely on. Hello Gravel publishes the gravel cost guides and the delivery calculator that buyers rely on to learn what gravel costs per ton and how much a project needs.
• Cheaper than big-box bagged. Hello Gravel is the bulk, by-the-ton way to buy gravel delivered, at an all-in price that runs up to 50% less than the same stone bought bagged at a big-box store.
• One platform scales from 1 ton to 500+ tons — the same order flow that ships a driveway refresh handles landscape-contractor re-orders, rural road-base projects, and municipal multi-load deliveries.

This guide provides a clear size chart, project-specific recommendations, and practical tips to help you select the perfect stone for any job. You’ll learn which sizes work best for different applications and how to calculate exactly how much material you need.

Quick Answer: Pea gravel (1/8″ to 3/8″) works best for walkways and decorative areas, #57 gravel (3/4″) is ideal for driveways, and larger stones (2″ to 6″) are perfect for drainage and erosion control.

What do gravel and rock sizes mean

Gravel and rock sizes refer to the diameter of individual stones, typically measured in inches or by numbered grades. Size directly affects three key factors: drainage capability, stability under load, and visual appearance.

The numbering system can seem confusing at first. Smaller numbers like #1 or #3 indicate larger stones, while higher numbers like #57 or #67 represent smaller gravel. This inverse relationship comes from the screen size used during production. For a deeper dive into understanding the numbering system for gravel, you’ll find detailed explanations of how these grades are determined.

Understanding size matters because each application requires different characteristics. Driveways need stones that compact well and resist rutting. Walkways require comfortable surfaces that won’t shift underfoot. Drainage systems need larger stones with gaps that allow water to flow freely.

Gravel and rock size chart

Here’s a quick reference chart showing the most common gravel and rock sizes with their typical applications:

Size/Grade	Diameter Range	Shape	Best Uses
Pea Gravel	1/8″ – 3/8″	Rounded	Walkways, playgrounds, decorative beds
#67 Gravel	1/4″ – 3/4″	Angular	Concrete mix, walkway base
#57 Gravel	3/4″	Angular	Driveways, parking areas
#3 Stone	1″ – 2″	Angular	Driveway base, French drains
Riprap	4″ – 24″	Irregular	Erosion control, shorelines

This chart serves as your starting point, but project-specific factors will help you narrow down the best choice for your needs. For more detailed comparisons and visual references, check out our gravel size chart with pictures.

Common gravel and rock types by size

Pea gravel and small decorative stones

Pea gravel ranges from 1/8 inch to 3/8 inch and features smooth, rounded edges that make it comfortable to walk on. This size works perfectly for garden pathways, playground surfaces, and decorative landscaping beds.

The small size allows excellent drainage while preventing the shifting problems you might experience with larger stones. However, pea gravel can migrate over time, especially on slopes, so consider edging materials to keep it contained.

Medium gravel and crushed stone

Medium-sized gravel, including popular #57 and #67 grades, ranges from 3/8 inch to 1.5 inches. These angular stones compact well together, making them ideal for driveways and walkways that need to support vehicle weight.

57 gravel, measuring about 3/4 inch, is the most common choice for residential driveways. Its size provides good drainage while creating a stable surface that resists rutting under normal traffic. To explore construction stone sizes for various building applications, our comprehensive guide covers everything from foundations to finishing work.

Pro Tip: Angular crushed stone compacts better than rounded river rock, making it the preferred choice for load-bearing applications like driveways and parking areas.

Large gravel and river rock

Stones ranging from 1.5 inches to 4 inches work well for decorative borders, drainage applications, and as base layers under smaller gravel. River rock in this size range creates attractive landscaping features while providing excellent drainage.

Large gravel also serves as an effective base layer for driveways, providing stability and preventing smaller stones above from sinking into the soil below.

Boulders and riprap

Stones larger than 4 inches, including boulders and riprap, serve specialized purposes like erosion control, retaining walls, and dramatic landscaping features. Riprap typically ranges from 6 inches to 24 inches and gets strategically placed along shorelines and steep slopes.

These large stones provide maximum stability and can withstand significant water flow, making them essential for controlling erosion in challenging environments.

Best gravel and rock sizes by project

Driveways and parking areas

For driveways, use a layered approach starting with #1 or #3 stone (2-4 inches) as a base layer for stability. Top this with #57 gravel (3/4 inch) for the driving surface, which provides good traction and compacts well under vehicle weight.

Avoid pea gravel for driveways, especially on slopes, as it will shift and create ruts. The angular shape of crushed stone is crucial for creating a stable, long-lasting driveway surface. For specific recommendations on driveway stone sizes, our ultimate chart breaks down the best options for different driveway types and traffic loads.

Walkways and patios

Pea gravel (1/8 to 3/8 inch) creates comfortable walking surfaces for garden paths and casual walkways. For patios that receive regular foot traffic, consider #67 gravel (1/4 to 3/4 inch) which offers better stability while remaining comfortable underfoot.

Always install proper edging to prevent gravel migration, and consider a fabric barrier underneath to prevent weeds while maintaining drainage.

Drainage and French drains

Drainage systems require larger stones with plenty of void space for water flow. Use #3 or #4 stone (1 to 2 inches) for French drains and drainage ditches. These sizes allow rapid water movement while filtering out soil particles.

Avoid smaller gravel for drainage applications, as it can clog with sediment over time and reduce effectiveness.

Important: Proper drainage stone should have minimal fine particles that could clog the system. Always specify “washed” stone for drainage applications.

Landscaping and decorative areas

For decorative landscaping beds, pea gravel provides an attractive, low-maintenance surface that suppresses weeds while allowing water to reach plant roots. River rock in the 1 to 3 inch range creates beautiful borders and accent areas.

Consider the maintenance requirements when choosing decorative stone. Smaller gravel may require occasional raking to maintain appearance, while larger stones stay in place better but can be harder to work around when planting. Our landscape stone size chart helps you find the perfect fit for any outdoor project, from garden beds to water features.

How to choose the right size

Start by clearly defining your project type and expected traffic load. Vehicle traffic requires different stone characteristics than foot traffic, and decorative applications have different priorities than functional ones.

Consider drainage requirements next. Areas with poor drainage need larger stones with more void space, while areas where you want to minimize water infiltration might use smaller, more compact materials.

Think about long-term maintenance as well. Smaller stones may require periodic replenishment and raking, while larger stones typically stay in place longer but can be more difficult to modify later. For a complete overview of common gravel sizes and their uses, our guide explains the practical applications of each size category.

Common mistakes include using pea gravel for steep driveways, choosing stones too large for comfortable walking, and selecting decorative stones without considering their functional requirements.

When you’re ready to make your selection, Hello Gravel offers a complete range of gravel and rock sizes with expert guidance to ensure you get exactly what your project needs. Our team can help you calculate quantities and coordinate delivery to keep your project on schedule.

Frequently Asked Questions

What size gravel is best for a driveway?

For most residential driveways, #57 gravel (3/4 inch) is the ideal choice for the top layer because it compacts well while providing good drainage. For the base layer, use larger #3 stone (1-2 inches) to provide stability and prevent settling. Avoid pea gravel for driveways as it tends to shift and create ruts under vehicle weight.

What size rock is best for drainage and French drains?

For French drains and drainage systems, use clean, washed #3 or #4 stone (1 to 2 inches) that allows rapid water movement while filtering out soil particles. Avoid smaller gravel or stones with fine particles, as these can clog over time and reduce drainage effectiveness. The larger stones create void spaces essential for proper water flow.

How much area does a yard of gravel cover?

One cubic yard of gravel typically covers about 100 square feet at 2-3 inches deep, or approximately 70-80 square feet at 4 inches deep. The exact coverage depends on the depth of your project and the type of stone. A cubic yard weighs between 2,600-3,000 pounds depending on the rock type and measures 3 feet by 3 feet by 3 feet.

What’s the difference between pea gravel and crushed stone?

Pea gravel consists of small, rounded stones (1/8″ to 3/8″) that are smooth and comfortable to walk on, making them ideal for walkways and decorative areas. Crushed stone has angular edges that lock together when compacted, providing better stability for driveways and load-bearing applications. While pea gravel is more attractive and comfortable, crushed stone offers superior compaction and durability.