How to Choose the Right Trailer Size

Why Trailer Size Matters

Buying a trailer that is too small means you'll be making multiple trips or leaving cargo behind. Buying one that is too large means you're hauling unnecessary weight, paying more at the pump, and potentially exceeding your tow vehicle's rated capacity. Getting the size right from the start saves money and frustration.

Trailer size is defined by three dimensions: length, width, and height (for enclosed trailers). Each affects what you can carry, how the trailer handles on the road, and where you can store it.

Interior vs. Exterior Dimensions

This is one of the most common sources of confusion when buying a trailer. A "16-foot enclosed trailer" refers to the interior floor length — the usable space inside. The exterior of that same trailer will be approximately 18–19 feet long once you account for the tongue, coupler, and rear ramp.

Always ask for both interior and exterior dimensions before purchasing. Key measurements to confirm:

• Interior floor length — the actual cargo space from front wall to rear door
• Interior width — typically 6 ft or 7 ft for cargo trailers; affects whether pallets or equipment fit side-by-side
• Interior height — critical for tall equipment, motorcycles, or standing work inside the trailer
• Overall exterior length — what matters for parking, storage, and legal length limits
• Tongue length — adds 3–5 feet to the overall footprint

Common Sizes by Use Case

Here are the most popular trailer sizes for common applications:

Matching Size to Your Tow Vehicle

Trailer size directly affects the weight you'll be towing. Before choosing a size, confirm your tow vehicle's tow rating and payload capacity from the owner's manual or the manufacturer's towing guide for your specific year, make, model, and engine.

A common mistake is choosing a trailer based on length alone without checking the loaded weight. A 16-foot equipment trailer loaded with a skid steer can easily weigh 14,000–18,000 lbs — far beyond what most half-ton trucks can safely tow.

As a general rule: never tow more than 80% of your vehicle's rated tow capacity for regular use. This leaves a safety margin for hills, headwinds, and emergency braking.

See our guide: What Size Trailer Can My Truck Tow?

Storage and Garage Clearance

Many buyers focus entirely on cargo capacity and forget about where the trailer will live when not in use. Before buying, measure:

• Garage door width and height — a standard 9-ft wide door won't fit an 8.5-ft wide trailer with fenders
• Garage depth — remember to add the tongue length to the trailer's floor length
• Driveway or yard space — longer trailers need more room to maneuver and park
• Local ordinances — some municipalities restrict trailer parking on public streets or in front yards

Practical Sizing Tips

• When in doubt, go one size up. A slightly larger trailer costs a modest amount more but gives you flexibility for future loads. Going too small means buying again sooner.
• Measure your largest item first. If you're hauling a specific piece of equipment, measure it — width, length, and height — before shopping for a trailer.
• Consider ramp angle. Longer trailers have a shallower ramp angle, which makes loading low-clearance equipment easier.
• Check axle count. A single-axle trailer is lighter and easier to maneuver; a tandem-axle trailer carries more weight and is more stable at highway speeds.
• Ask us. Our team at Patriot Trailer Solutions has helped thousands of customers match the right trailer to their needs. Send us a message or call (833) 782-2746 — we're happy to help.

Ready to shop? Browse our current inventory or explore trailers by category:

• Enclosed Trailers in Central New York
• Equipment & Utility Trailers
• Dump Trailers
• Livestock & Horse Trailers