Measure the platform
Old mattresses compress, bow, and shift. The usable sleeping surface is the reference—not the mattress sitting on it.
PolarBed RV Mattress Buying Guide
Find the right RV mattress without guessing
RV mattress shopping comes with pitfalls that residential buying doesn't—non-standard sizes, limited clearance, and size labels that don't mean what you expect. This guide walks through how to measure, which sizes to watch out for, and how to choose the right comfort for your rig.
Search by RV make & floorplan
Fit first, comfort second
Build to order
Fit before feel
Four checks for a better RV mattress experience
The label on the old mattress is not a reliable size reference. Here is where mistakes actually happen.
Check mattress height
Overhead clearance matters as much as the platform. Check bunk slats, cabinets, folding mechanisms, and any overhead obstruction before choosing a model.
Confirm the corners
PolarBed mattresses currently use square corners. If your platform has a radius, notch, or angle cut, identify this before you order—not after.
Confirm your RV model
Options, trim levels, and mid-year changes can alter a floorplan layout. Use the Finder for model-specific guidance, then verify your own unit.
Common labels, specific traps
RV mattress names sound familiar — the dimensions often are not
Each label carries a built-in confusion. Here is the exact mix-up to watch for, plus the PolarBed path to get the right fit.
| Common RV label | Typical dimensions | The mix-up to avoid | PolarBed path |
|---|---|---|---|
| Short Queen | 60 × 74″ (common) | Same width as a residential Queen, but typically shorter. A standard 60 × 80 mattress will overhang the foot end or crowd the base of the bed. | Shop Short Queen → — multiple short lengths available; if yours differs, select Custom Size on the product page. |
| Queen | 60 × 80″ | “Queen” sometimes means a true residential Queen in larger RVs; other times the label is applied loosely to shorter platforms. Measure before assuming 80 inches. | RV Queen collection → — if your platform is exactly 60 × 80, choose that size; otherwise select Custom Size. |
| Olympic Queen | 66 × 80″ | Six inches wider than a standard Queen. Easy to mistake for an RV King when shopping by name. An RV Queen mattress here would leave a 6″ gap on one side. | Shop Olympic Queen (66 × 80) → |
| RV King | 70 × 80″ or 72 × 80″ | Narrower than a residential King (76 × 80). The exact width varies by manufacturer—70 and 72 are both common. “King” alone is not enough information. | RV King collection → — confirm your exact width before ordering. |
| Short King | 72 × 74″ or 70 × 74″ | RV-King width with a shorter length. Frequently confused with 72 × 80—a 6″ overhang on a slide-out or bump-out bed. | Shop Short King (72 × 74) → — or select Custom Size if your width is 70″. |
| Three-Quarter (3⁄4) | Often 48 × 75″ | Not a consistently defined size. Older rigs and different manufacturers use different widths. Ordering on name alone frequently produces the wrong mattress. | Shop RV 3⁄4 → — measure first; select Custom Size for your exact dimensions. |
| RV Bunk / Twin | Varies widely | Bunk width is not standardized across manufacturers. Two bunks in the same RV can have different dimensions. The “twin” label can mean anything from 28″ to 39″ wide. | RV Bunk / Twin collection → — measure each bunk independently. |
How to measure
Measure what the mattress has to fit into
Three dimensions and one shape check. That’s it.
Measure the platform, not the old mattress. Check the usable width and length from edge to edge.
Width
Measure side to side across the usable sleeping platform.
Length
Measure head to foot along the longest axis. Do not assume “Short Queen” means exactly 75 inches, or “Queen” means exactly 80.
Available height
On bunks, measure from the platform surface to the slat or structure directly above. On cabover beds, check the overhead obstruction. Leave room to get in and out comfortably.
Corner check
Confirm that all four corners of the platform accept a full rectangle with square corners. Note any radius, angled cuts, or obstructions.
Custom size advantage: PolarBed builds custom widths and lengths across all four mattress models. An unusual rectangular platform doesn’t limit which model you can order.
Standard or custom?
Let the platform decide—not the label
Most RV shoppers land in one of three situations. Find yours.
Exact standard match
Your measured platform matches one of PolarBed’s listed standard sizes exactly, and the available height fits your chosen model.
→ Order the standard size directly.
Uncommon width or length
The platform is rectangular but sits between standard listings. All four PolarBed models—PUP, CUB, MA, and PA—are available in custom widths and lengths. An unusual rectangular platform doesn’t limit which model you can order.
Select the closest standard size above, then choose Custom Size on the product page and enter your exact dimensions.
→ Choose any model. Enter your exact dimensions.
Shaped corner required
The platform has a radius, angled cut, notch, or other non-rectangular feature.
PolarBed mattresses currently use square corners. Selected angled-corner options may be available through DirectBed.ca. Contact PolarBed before ordering.
Choose comfort after fit
One RV size. Four ways to sleep in it
Every model below is available in custom widths and lengths. The differences are in height, construction, and comfort feel.
Mattress height comparison
6″
PUP
10″
CUB
12″
MA
15″
PA
PUP
Lower Profile
A 6″ slim-profile foam mattress built for low-clearance spaces. If bunk height or cabinet clearance is your main constraint, start here.
- 6″ total height
- Cooling memory foam + HD foam base
- Black ICE Yarn conductive cooling cover
- All-foam construction
Mattress height comparison
6″
PUP
10″
CUB
12″
MA
15″
PA
CUB
Foam Comfort
A 10″ all-foam mattress for RVers who have the profile clearance and want a fuller, more cushioned sleep surface.
- 10″ total height
- Graphite foam core + cooling foam layer
- ICE Yarn quilt cover
- All-foam construction
Mattress height comparison
6″
PUP
10″
CUB
12″
MA
15″
PA
MA
Hybrid Pocket Coil
A 12″ hybrid combining a zoned pocket coil system with graphite foam and a memory foam pillow top. Coils add responsive support and airflow that all-foam mattresses don’t provide.
- 12″ total height
- Zoned pocket coil system
- Quantum coil edge reinforcement
- Memory foam pillow top + graphite foam
- Black ICE Yarn cooling cover
Mattress height comparison
6″
PUP
10″
CUB
12″
MA
15″
PA
PA
Coil-on-Coil Luxury
A 15″ flagship with 2,400 coils across two separate coil layers, plus nano coils above for detailed contouring. For RVs with the profile clearance to accommodate it.
- 15″ total height
- Coil-on-coil: 2,400-coil system
- Nano coil contouring layer
- Quantum Edge unit + luxury pillowtop
- Black ICE Yarn cooling cover
RV-specific factors
Beyond the size: what else shapes the right choice
Once fit is confirmed, four factors often separate the right mattress from the right-sized wrong mattress.
Weekend-only use and full-season or full-time living put different demands on a mattress. High-use campers often benefit from the added durability and support of a pocket coil construction (MA or PA).
More mattress is not an upgrade when it closes off bunk clearance or makes a slide-out mechanism stiff. Confirm your height before choosing between models.
RV interiors can build heat quickly. Pocket coil constructions (MA and PA) allow air to circulate through the mattress in a way foam-only mattresses do not. All PolarBed models use conductive cooling technology in the cover and cooling foam.
Consider mattress weight, the size of the door or bunk opening, and whether the platform has under-bed storage that requires lifting the mattress. Getting a mattress into an RV is different from a house.
A mattress has to fit through the RV before it can fit the bed.
PolarBed mattresses are roll-packed for shipping, making them significantly easier to carry through tight RV doors and awkward interiors before they expand.
PolarBed buying confidence
What to look for beyond the mattress label
Three practical things worth comparing before you order any RV mattress online.
Foam certifications indicate that materials have been tested for harmful substances. An RV is a small, enclosed space—the foam your mattress is made of matters more there than it does in a large bedroom.
PolarBed mattresses are built with over 40 years of North American manufacturing experience behind them. That means consistent quality, reliable sizing, and support from a team that stands behind the product.
Shipping costs for a mattress can be significant, especially for custom sizes. PolarBed offers free shipping on all orders and a 100-night satisfaction guarantee—so you can try your mattress in the actual RV before committing.
A note on shaped corners
Ask About Corner Fit
PolarBed mattresses currently use square corners. If your RV platform requires an angled corner, contact PolarBed before ordering. Selected options may be available through DirectBed.ca.
FAQ
Questions shoppers ask before they order
Does PolarBed make custom-size RV mattresses?
Yes. PolarBed offers custom widths and lengths across all four mattress models—PUP, CUB, MA, and PA. Select the closest standard size on the product page, choose Custom Size from the size selector, and enter your exact platform dimensions. Custom sizing is part of the standard build-to-order process.
What is the difference between an RV Short Queen and a standard RV Queen?
Both are 60 inches wide, but a Short Queen is shorter in length—commonly 74 inches, though this varies by manufacturer. A standard Queen is 80 inches long. The difference matters because a standard Queen mattress ordered for a Short Queen platform will overhang the foot of the bed. Always measure head to foot before ordering.
Does a roll-packed mattress make a difference when buying for an RV?
Yes—significantly. RV doors, hallways, and bunk openings are often too narrow for a flat mattress. A roll-packed mattress compresses down to a manageable cylinder that fits through tight spaces and can be positioned in the rig before expanding. PolarBed mattresses ship roll-packed.
What if my RV is not in the Finder?
Measure the usable platform width and length, check your available mattress height, and confirm the corner shape. The RV Mattress Finder covers many models, but it won’t list every rig. Measuring your own platform is the reliable fallback, and custom widths and lengths are available across the entire PolarBed lineup.
Can I use a residential Queen or King in my RV?
Only when your RV platform actually measures the same as that residential size and the available height can accommodate the mattress. RV size labels often reuse residential names while describing different dimensions—a residential King is 76″ wide while most RV Kings are 70″ or 72″ wide. Always confirm with your tape measure first.
How do I find out the height clearance available for my RV mattress?
On a bunk bed, measure from the platform surface straight up to the slat, board, or structure directly above it. On a cabover or slideout bed, check the overhead obstruction when the slideout is closed. Leave a few extra centimetres beyond the mattress height so you can comfortably get in and out. When in doubt, the thinner PUP model gives you the most headroom.
Ready to narrow it down?
Search your RV—or shop the exact size you need
The best starting point is real fit information. Use the Finder if you know your RV model, or browse all four models if you already have your measurements.