The size in a trailer's name is the box. It is not how much room the trailer takes up. A 7x16 enclosed trailer has a 16-foot box, but it needs closer to 21 feet of space to park. That gap catches people out at the garage door, at the storage lot, and on the driveway beside the house.
This page lays out the three lengths that actually matter, where the extra feet come from, and how to measure the space you need before you buy. Every number here comes from a manufacturer's own published specification sheet, and the sheets are linked at the bottom so you can check them.
The three lengths on every enclosed trailer
- Box length. The number in the name. A 7x16 has a 16-foot box.
- Interior length. A couple of inches shorter than the box, because the walls have thickness.
- Overall length. Coupler to rear bumper. This is the one that decides whether the trailer fits.
Here is what that looks like on a trailer we stock. These are the published figures for the Stealth XLT Pro Series 7-foot-wide enclosed cargo line, built by ALCOM.
| Model | Box length | Interior length | Overall length | V-nose | GVWR | Curb weight |
|---|---|---|---|---|---|---|
| 7x14 XLT Pro | 14 ft | 13 ft 10 in | 18 ft 8 in | 18 in | 7,000 lb | 1,480 lb |
| 7x16 XLT Pro | 16 ft | 15 ft 10 in | 20 ft 8 in | 18 in | 7,000 lb | 1,580 lb |
The pattern holds across the rest of the line too. Stealth's standard 7-foot-wide cargo trailers, which use a 24-inch V-front instead of the XLT's 18-inch nose, come out at the same overall lengths:
| Model | Box length | Interior length | Overall length |
|---|---|---|---|
| 7x12 | 12 ft | 11 ft 10 in | 16 ft 8 in |
| 7x14 | 14 ft | 13 ft 10 in | 18 ft 8 in |
| 7x16 | 16 ft | 15 ft 10 in | 20 ft 8 in |
| 7x18 | 18 ft | 17 ft 10 in | 22 ft 8 in |
Where the extra feet come from
Two things sit outside the box. The nose is one: on the XLT Pro it is an 18-inch V-nose, and on the standard line it is a 24-inch V-front. The tongue and coupler are the other, and they make up the rest.
Add them together and you get 4 feet 8 inches on this line, at every length. Other builders use different nose depths and different tongue lengths, so two trailers both sold as a 7x16 can need different amounts of driveway. Do not assume the number carries across brands. Ask for the overall length on the trailer you are actually buying.
Width works the same way
A "7-foot-wide" enclosed trailer is 7 feet across the box. Measured across the fenders and exterior trim, the same trailer is 101 inches, which is 8 feet 5 inches.
That is not an accident. North Carolina law caps the total outside width of a vehicle or its load at 102 inches, under G.S. 20-116(a). Trailer builders design right up to that line and stop. It is also why the widest common trailer is called an 8.5, and why an 8.5-wide leaves you no margin for anything hanging over the side.
One more thing that trips people up: enclosed trailers and open trailers are not quoted the same way. Enclosed widths are given in feet, measured to the outside of the walls. Open utility and landscape trailers are usually quoted in inches of usable deck width, so a trailer listed as a 6x14 may have a 72-inch deck and a 7x16 an 84-inch deck. When you are comparing an open trailer against an enclosed one, you are comparing two different measurements.
Height, and the door you actually have to fit through
Interior height and door opening height are two different numbers. On the Stealth 7x16 XLT Pro, the interior is 76 inches tall and the rear door opening is 72 inches. The header across the top of the opening, where the ramp door springs live, takes the difference.
The inside of the trailer will swallow a tall load. The doorway is what stops it. Measure the opening, then leave yourself a couple of inches for the angle of the load coming up the ramp.
Overall height on that same trailer is 97 inches, or 8 feet 1 inch. North Carolina's legal height limit is 12 feet 6 inches, and above that line you are responsible for whatever you hit. We cover that and the rest of the state's limits on our North Carolina trailer laws page.
How to measure the space you need
- Get the overall length, not the model size. Ask for it, or read it off the manufacturer's spec sheet. If nobody can tell you, put a tape on the trailer from the tip of the coupler to the back of the bumper.
- Add room to swing the doors. A rear ramp door needs several feet of clear ground behind the trailer to come down. Barn doors need room to swing out.
- Add room to walk around it if it is going in a garage or a shed.
- Check the entry, not just the space. A trailer that fits inside a garage still has to get through the door, and it has to turn to get there.
- If you are renting storage, measure before you sign. A 20-foot space will not hold a 7x16 enclosed trailer.
Quick reference
| What you want to know | Where the number comes from |
|---|---|
| Will it fit in my garage or storage space? | Overall length and overall height |
| Will my load fit inside? | Interior length, width and height |
| Will my load fit through the door? | Rear door opening, not interior height |
| Is it legal to tow? | Overall width (102 in max) and height (12 ft 6 in max) |
| How much can I load on it? | GVWR minus curb weight |
Sources
- Stealth Trailers (ALCOM), Enclosed 7' Wide XLT Pro Series Cargo Trailers specification sheet.
- Stealth Trailers (ALCOM), Enclosed 7' Wide Cargo Trailers specification sheet.
- North Carolina General Statutes, G.S. 20-116, size limits of vehicles and loads.
Still working out what size you need? Our enclosed trailer size guide walks through what fits in each one. Or come look at them in person. Our enclosed inventory is at both lots, and we will put a tape on any trailer on the yard for you.