RV Mattress Sizes Explained: Short Queen, RV King, Bunks and How to Measure

If you have ever ordered a “queen” mattress for your camper and found it hanging off the end of the platform, you already know the problem. RV mattress sizes often differ from the sizes you know at home. A short queen mattress, an RV king and a dozen bunk sizes all exist because RV floor plans squeeze beds into tight spaces around slide-outs, wardrobes and wheel wells. This guide lays out every common RV size in one chart, explains how to measure your bed correctly, and walks through thickness, materials, weight and the practical challenge of getting a new mattress into the RV.

Last reviewed and updated: September 30, 2026. Written by Jeremy Jarvis.

A good night’s sleep matters even more on the road than at home. After a long travel day, or before a workday in your rig, the bed is the one piece of furniture you use every single day. As a result, a mattress upgrade is one of the most popular and worthwhile improvements RV owners make.

Why RV mattress sizes are different

Space is the reason. In a house, the bedroom is built around the bed. In an RV, however, the bed has to share a narrow box with closets, nightstands, slide-out mechanisms and a walkway. Manufacturers therefore trim a few inches wherever they can. The most common example is the short queen, which saves floor length in rear and front bedrooms. Similarly, RV kings often lose width so that there is still room to walk around the bed.

In addition, some RV bed platforms have rounded or cut corners so you can squeeze past them, and some beds sit on lift-up platforms that cover storage. Because of these design choices, two RVs that both claim a “queen” bed may need different mattresses. That is why measuring your own platform is always the first step.

RV mattress sizes chart

The table below collects the standard sizes published by major mattress makers. Purple, Nectar and Amerisleep agree on these dimensions, although individual RVs can still vary.

Each RV mattress size explained

RV bunk and RV twin

Bunk mattresses are the smallest RV sizes. Purple’s guide lists common RV bunk sizes from 28 by 75 inches up to 35 by 79 inches, and Amerisleep suggests measuring your bunks before deciding, since layouts vary so much. RV twins come in 28 by 75 and 28 by 80 inches; Purple notes they are 10 inches narrower than a standard twin. For family RVs with bunkhouses, thin and light mattresses make it easier to lift and change sheets on upper bunks.

Truck size and three-quarter

Truck mattresses, named for their use in semi-truck sleeper cabs, measure 35 to 42 inches wide by 79 to 80 inches long. They often appear in cab-over bunks in Class C motorhomes. Meanwhile, the three-quarter mattress, at 48 by 75 inches, sits between a twin and a full and suits one adult or two children.

RV full

The RV full, or double, measures 53 by 75 inches, about an inch narrower than a standard full, according to Purple. You will find it in smaller travel trailers, teardrops and some camper vans.

Short queen mattress

The short queen mattress is the most common RV master bed. At 60 by 75 inches, it is as wide as a standard queen but five inches shorter. For many couples, that difference is barely noticeable. Taller sleepers, however, may find their feet hanging off the end. In that case, check whether your platform can be extended, or whether a standard queen will fit without blocking a door or slide.

RV king

RV kings appear in larger fifth wheels and Class A motorhomes. Purple lists the RV king at 72 by 80 inches, four inches narrower than a standard king. Amerisleep notes that RV kings range from 72 by 75 to 72 by 80 inches, so a “short king” also exists. Again, measure before you shop.

How to measure your RV bed for a new mattress

Measuring takes ten minutes and prevents expensive returns. Follow these steps:

1. Remove the old mattress. Measure the platform itself, not the mattress, because old foam compresses and shrinks.
2. Measure length and width at several points. Platforms are not always perfectly square.
3. Check the corners. Note any rounded or angled corners and measure how much is cut off.
4. Measure height clearance. Measure from the platform to the lowest overhead cabinet, window ledge or upper bunk.
5. Check slide-out clearance. If the bed is in a slide, retract the slide and confirm the bed and new mattress will clear walls and furniture.
6. Check bed-lift travel. If the platform lifts for storage, make sure the struts can hold the heavier mattress.
7. Measure the path inside. Measure the entry door, hallway and bedroom doorway.

Write the measurements down and keep them in your phone. They will also help when you shop for sheets, toppers and mattress protectors that fit RV mattress sizes correctly.

Choosing the right thickness

Thickness is a balance between comfort and clearance. Amerisleep and Nectar both note that factory RV mattresses are often foam about 5 to 6 inches thick, which many owners find less comfortable than a home mattress. Upgrading to a thicker mattress can make a big difference. However, a thick mattress may hit overhead cabinets, block a window, or prevent a slide-out from closing. For example, a bed under a cab-over or an upper bunk often has very little headroom.

Also, think about how the mattress sits on the platform. If the bed has a raised lip around the edge, a thicker mattress can rise above it, which is fine, but the sheets and bedding need to fit too. As a rule, choose the thickest mattress that still leaves comfortable headroom and lets every slide, door and cabinet operate freely.

Camper mattress materials

Most replacement RV mattresses use one of three constructions. Each has pros and cons for life on the road.

• All-foam (memory foam or poly foam): light, flexible and easy to fold or bend into an RV. Some sleepers find memory foam warm.
• Latex: responsive and durable, often cooler than memory foam, but heavier and usually more expensive.
• Hybrid (coils plus foam): closer to a home mattress feel, but heavier and harder to bend through doorways.

Climate matters as well. In humid places, moisture can build up under a mattress that sits on a solid platform, especially when the RV is closed up. Therefore, many owners add a breathable underlay or ventilated mat beneath the mattress, and they lift the mattress occasionally to let it air out.

Weight and payload

Mattress weight is easy to forget, but it counts against your RV’s carrying capacity like everything else you load. A heavy hybrid king can weigh much more than the thin foam mattress it replaces. While a single mattress rarely makes or breaks a weight budget, it adds up with other upgrades. If you are close to your limits, our RV Weight and Payload Worksheet helps you track what you add. In addition, a heavy mattress on a lift-up platform can overwhelm the gas struts, so the bed may not stay open; check strut ratings before you upgrade.

Getting a new camper mattress inside

RV doors are narrow, and hallways have tight turns. Fortunately, many modern mattresses ship compressed and rolled in a box. You can carry the box inside, open it in the bedroom and let the mattress expand there. This is by far the easiest option for most RVs. However, follow the maker’s instructions on expansion time before sleeping on it, and open the windows to let any new-product smell clear.

If your mattress does not come rolled, foam models can often be bent to pass through the door. Hybrids are harder, since bending them can damage the coils. Before buying a hybrid, check your door and hallway measurements carefully. In some RVs, the only way to fit a large hybrid is through a window or an emergency exit, which is a job best done with help.

Slide-outs, bed lifts and other clearance checks

Bedroom slides are common in larger RVs, and they add one more check. When the slide is retracted, the bed often sits against a wall or a cabinet. Consequently, a thicker or longer mattress can stop the slide from closing fully, which is a serious problem on a travel day. Always test the slide with the new mattress before you hit the road.

Many RV beds also lift on gas struts to reveal storage beneath. Since a heavier mattress can make the bed hard to lift or unable to stay open, check that the struts are rated for the new weight, and replace them with stronger ones if needed. Finally, check any wall-mounted TV, nightstand or cabinet door that swings near the bed.

Mattress toppers: a lighter upgrade

If a full replacement is not practical, a topper can transform a thin factory mattress. Toppers add a comfort layer of memory foam, latex or fiber on top of the existing mattress. They are lighter, cheaper and easier to fit through the door. On the other hand, a topper adds height, so the same clearance checks apply. Choose a topper sized to your exact RV mattress size, because a standard queen topper on a short queen bed will hang over the end.

Sheets and bedding for RV mattress sizes

Once the mattress fits, bedding becomes the next puzzle. Standard queen sheets will technically go on a short queen mattress, but the extra length bunches up at the foot of the bed. Likewise, standard king sheets on an RV king leave loose fabric along the sides. For a neat, comfortable bed, look for sheets labeled specifically for RV sizes, such as short queen or RV king. In addition, check the pocket depth of fitted sheets, since a thicker replacement mattress plus a topper may need deep pockets.

Making the bed in an RV is also harder than at home, because many beds sit against walls on one or both sides. For this reason, many RVers switch to bedding designed for tight spaces, such as zip-on or fitted comforters, or simply use a fitted sheet and a lightweight blanket. Similarly, bunk beds are easier to make with fitted sheets that have elastic all the way around.

Sleeping well in an RV: beyond the mattress

A great mattress is only part of good sleep on the road. Temperature, condensation and noise matter too. First, ventilation helps. RVs are small, sealed spaces, so breathing at night adds moisture to the air. As a result, windows and walls near the bed can collect condensation, especially in cold weather. Cracking a roof vent or running a vent fan on low reduces that moisture and keeps the bedding drier.

Next, consider temperature. RV walls are thinner than house walls, so bedrooms warm up quickly in the sun and cool down quickly at night. Layered bedding lets you adjust easily. Meanwhile, reflective window covers and blackout curtains help with both heat and early-morning light. Finally, noise can be a challenge at busy campgrounds. Earplugs or a small white-noise machine can make a surprising difference, and choosing a site away from the road or the dump station helps too.

Above all, a level bed matters. If the RV tilts, you will feel it at night, and you may wake up sliding toward one side. So, before you blame the mattress, check that the RV is level side to side and front to back.

RV mattress buying checklist

1. Measure the bed platform, not the old mattress.
2. Record corner shapes, headroom and slide-out clearance.
3. Match one of the standard RV mattress sizes, or order a custom size.
4. Pick a thickness that clears cabinets, windows and slides.
5. Choose a material that suits your climate and your sleep.
6. Check the weight against bed-lift struts and payload.
7. Prefer a rolled, boxed mattress if your door or hall is tight.
8. Buy sheets and protectors made for RV sizes.

To compare current options, you can browse short queen RV mattresses, RV king mattresses and RV mattress toppers on Amazon, then check each listing’s exact dimensions against your measurements.

Common RV mattress mistakes

• Buying a home queen for a short queen platform. It overhangs and can block doors and slides.
• Measuring the old mattress instead of the platform. Old foam shrinks and compresses.
• Ignoring headroom. A thick mattress can make a bunk or cab-over unusable.
• Forgetting the bed lift. Heavy mattresses can overwhelm the struts.
• Skipping the door measurement. Some mattresses simply will not fit through.

Getting the right size is the hardest part of an RV mattress upgrade. Once you know your exact RV mattress sizes and clearances, choosing comfort is the easy part. For more ways to make your rig feel like home, explore our RV Gear hub and RV Living hub, and look up unfamiliar terms in the RV glossary.

Frequently asked questions about RV mattress sizes

What size is an RV queen mattress?

Most RV queen mattresses are short queens measuring 60 by 75 inches, which is five inches shorter than a standard queen, according to Purple’s size guide. Some RVs use a standard 60 by 80 inch queen, so measure first.

How big is an RV king mattress?

Purple lists the RV king at 72 by 80 inches, four inches narrower than a standard king at 76 by 80. Amerisleep notes that RV kings range from 72 by 75 inches to 72 by 80 inches.

Can I put a regular queen mattress in an RV?

Sometimes. If your platform measures 60 by 80 inches, a standard queen fits. On a short queen platform, a standard queen will overhang by about five inches and can block doors or slide-outs.

How thick should an RV mattress be?

Check the clearance above your bed, especially under cabinets and in bunks. Amerisleep notes that factory RV mattresses are often foam about 5 to 6 inches thick, and many owners upgrade to a thicker mattress where space allows.

What is a three-quarter RV mattress?

A three-quarter mattress measures 48 by 75 inches, according to Purple and Amerisleep. It sits between a twin and a full and can sleep one adult or two children.

Sources and how we researched this guide

This guide is research-based. We did not test the mattresses mentioned. Dimensions come from published size guides by Purple, Nectar and Amerisleep, which agree on the standard RV sizes. Individual RVs vary, so always measure your own bed platform before buying. Found something out of date? Tell us and we will check it against the source.

• Purple: RV mattress sizes and dimensions
• Nectar: RV mattress sizes
• Amerisleep: RV mattress sizes and types
• Sleep Foundation: mattress sizes

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