If your RV is 44 ft long, there is a size for it. Here's how to find yours with one tape measure.
Most of the questions we get under our ads are the same one: is there a cover long enough for my rig? There is. The cover comes in nine lengths, and the width is the same on all of them, so the length is the one number to measure. Below is how to measure it, which size to pick when you land between two, and what your size costs.
By Anders from the warehouse.
Last updated November 7, 2026.
Summary: The sizes run from 18 ft up to 44 ft, and four of them are 34 ft or longer: 34, 38, 41 and 44. Every size is 10 ft wide, so you measure one thing: the body from end to end, hitch not included. Land between two sizes and take the longer one, and with lots of gear on the roof, go one size up.
The cover itself: black or white 210D Oxford fabric, waterproof and sun-resistant, from $199. It covers the roof only, fits over rooftop A/C units, roof vents and skylights, and the edge hangs 12 to 16 inches down the sides. One person puts it on, shipping to the US is free and takes 5 to 10 business days, and you get 90 days to send it back or get a refund.
1. There's a size for long rigs too.
The cover comes in nine lengths: 18, 21, 25, 28, 31, 34, 38, 41 and 44 ft. Four of them are 34 ft or longer, made for the big travel trailers, fifth wheels and motorhomes. If your rig is 40 ft, your size is on that list, and so is the one for a 44 ft RV.
2. Measure the body, not the hitch.
Run the tape along the body from one end to the other. The hitch doesn't count, because the cover goes on the roof and the hitch sits out in front of it. On a fifth wheel, measure the main flat part of the roof and pick your length from that. Whether the cover also reaches over the raised front above the hitch, we don't have the maker's answer, so we don't claim it.
3. Between two sizes? Take the longer one.
If your number lands between two sizes, take the longer one. The same goes for a busy roof: the cover fits over rooftop A/C units, roof vents and skylights, and with lots of gear up there, or a very tall A/C unit, go one size up. A cover that's a little long still sits right. One that's short leaves part of the roof bare.
4. The width is the same on every size.
Every size is 10 ft wide, so you never measure across. A travel trailer or a fifth wheel is usually about 8 ft wide, or 101 to 102 inches on a wide body, so the edge hangs 12 to 16 inches down both sides. It covers the roof only, not the slide-outs, and nothing hangs lower than that edge, so the door opens with the cover on.
5. Read your price off the table, then order one.
The price is set by length, and the table below shows the price for one cover in each size, from $199 at the shortest. On the product page the bundle box opens on a 2-pack, so with one rig, switch it to 1 pack and you pay your row. The box holds the cover folded with its woven webbing straps. Shipping to the US is free, and if the size turns out wrong for your rig, you have 90 days to send it back or get a refund.
Your length, your price, before you click anything
Every size is 10 ft (3 m) wide, so the only thing to measure is the length: the body, hitch not included, rounded up to the next size when you land between two. One cover costs what its row says. On the product page the bundle box opens on a 2-pack, so with one RV, switch it to 1 pack and you pay the row.
Nothing here is shorter than 18 ft or wider than 10 ft. A smaller rig, or a wider one, needs a different cover, and we'd rather lose the sale than your trust.
What owners of long rigs ask before they order
Is there one for a 40 ft rig?
Yes. For a 40 ft rig, take the 41 ft size, the next one up. The lengths run to 44 ft.
Do I include the hitch when I measure?
No. Measure the body from end to end, hitch not included, and round up to the next size when you land between two.
Does it fit a fifth wheel?
Yes, on the width: a fifth wheel is usually about 8 ft wide, or 101 to 102 inches on a wide body, and the cover is 10 ft wide, so the edge hangs down both sides. Measure the main flat part of the roof and pick your length from that. Whether it also reaches over the raised front above the hitch, we don't have the maker's answer, so we don't claim it.
Will it fit over my A/C?
Yes. It fits over rooftop A/C units, roof vents and skylights. With a lot of gear up there, or a very tall A/C unit, go one size up.
Does it cover my slide-outs?
No. It's 10 ft wide and covers the roof only, not the slide-outs.
What if I pick the wrong size?
You have 90 days to send it back or get a refund, whatever the reason. Shipping to the US costs you nothing.
Can I order two different lengths?
Yes. In the bundle box each cover gets its own size, so two rigs of different lengths fit in one order.
Can one person put a long one on?
Yes, one person puts it on. The bundle goes up on the roof, you pull it out from the middle toward both ends, and then you walk around the rig and hook the straps one by one. Doing the whole job from a ladder, without stepping onto the roof, is the one thing we can't promise.
How long does shipping take?
Free to the US, and 5 to 10 business days to your door.
So what do the people who do cover the roof do differently?
They stop waiting for the perfect cover and buy the one they'll actually put on. Length off the table, bundle box set to 1 pack, and the 90 days treated as a test drive rather than a warranty: on goes the cover before the first real rain, and the day it turns out the A/C or the straps make it wrong for their rig, back it goes.
The box holds one cover in the length you picked: black 210D Oxford that sheds rain and takes the sun, 10 ft across, woven webbing straps on all four sides with hooks for the edge of the body, and two reinforced straps for the top. When the season ends it folds small enough to carry under one arm. It ships free to the US in 5 to 10 business days, and it comes with the one thing we can actually promise: 90 days to return it or get your money back.
I'll be honest:
this cover isn't for every rig. Shorter than 18 ft or wider than 10 ft, and none of the nine sizes fit, so keep your money. Parked somewhere damp with no way to leave a gap under the cover, and you're better off waiting for the spacer. And if you want the sides and the wheels wrapped too, buy a full-body cover from someone who makes one.
There are also two things about it we don't know: the raised front of a fifth wheel, and how much snow it holds. We don't have the maker's answer on either of them, and an honest gap beats a confident guess.
Last, the price. It's set by length, from $199 at 18 and 21 ft to $389 at 44 ft, and the table above is the price for one cover. The bundle box on the product page opens on a 2-pack, so if you own one rig, click it down to 1.
That's why you can try it risk-free.
Read your length off the table, or open the product page and pick it there. Then let the 90 days do the deciding. Wrong size, wrong roof, wrong idea, whatever the reason, tell us within 90 days and either the cover comes back to us or the money goes back to you. Shipping to the US costs you nothing.