Bunk (36 × 84) mattresses

Updated Oct 26, 2026 · 10 makers’ own size lists checked · findings from 6 independent testing sites · How we pick

36 × 84 inches 91.4 × 213.4 cm

A 36 × 84-inch mattress fits some RV and cabin bunks. It is also the size of one half of a split California king, so two side by side make a 72 × 84 bed.

We’ve gathered every Bunk (36 × 84) mattress we could find into one list: 44 from 10 makers, each sold in exactly 36 × 84 inches.

  • 44 mattresses in this exact size
  • 31 ready-made, 13 made to order
  • 43 you can return
  • 17 independently tested
See the mattresses

Is your bed a bunk (36 × 84)?

Measure inside the frame and enter the inches.

Twin XL38 × 80″Bunk (36 × 84)36 × 84″California king72 × 84″

Best bunk (36 × 84) mattresses, according to expert reviewers

Picked from what independent reviewers found in their testing (Sleep Foundation, RTINGS, Mattress Clarity, Sleepopolis and others), among mattresses sold in exactly 36 × 84″. Ordered by the evidence, not by commission; we may earn one if you buy.

Best overall

RVMattress.comTitan Plus Core36 × 84″: from $932

Independent testers liked it for back sleepers, stomach sleepers, heavier people and hot sleepers. (Mattress Clarity, Sleepopolis, Sleep Foundation)

Watch out: RVMattress.com labels the short queen 60″ × 74″, but brooklynbedding.com labels the same model's short queen 60″ × 75″; confirm before ordering.

See this size at rvmattress.comDetails

Best for back sleepers

RVMattress.comTitan Plus Luxe36 × 84″: from $999

Good for heavier back sleepers. (Sleep Foundation, Sleepopolis)

Watch out: RVMattress.com labels the short queen 60″ × 74″, but brooklynbedding.com labels the same model's short queen 60″ × 75″; confirm before ordering.

See this size at rvmattress.comDetails

Best for heavier people

RVMattress.comPlank Firm36 × 84″: from $849

Best for heavier sleepers. (Sleep Foundation, Mattress Clarity)

Watch out: Brooklyn Bedding calls it a ten on its firmness scale, so it suits people who want a very firm bed.

See this size at rvmattress.comDetails

Best value

RVMattress.comCopperFlex RV Hybrid36 × 84″: from $699

The lowest price in 36 × 84″ among mattresses reviewers rated well on two or more counts. (Sleep Foundation)

Watch out: The 10″ version uses a 6″ coil unit; the 12″ and 14″ use 8″ coils.

See this size at rvmattress.comDetails

All 44 Bunk (36 × 84) mattresses

Each one is sold in exactly 36 × 84 inches, checked against the maker’s own size list.

See all 44 Bunk (36 × 84) mattresses Showing 40 here: ready-made first, then ones with photos.

It is longer than a twin XL (38 × 80) and two inches narrower. Check both measurements. We may earn a commission from qualifying purchases. How we choose and research

See every spec side by sideFeel, height, how it’s sold and returns for the 40 above, in one table
Detail
TypeHybridMemory foamHybridHybridFoamHybridHybridHybridHybridHybridHybridLatex hybridHybridFoamLatexLatex hybridLatexHybridHybridHybridHybridHybridHybridHybridHybridHybridHybridHybridHybridFoamLatexHybridMemory foamMemory foamMemory foamMemory foamMemory foamFoamFoamHybrid
FeelSoft, medium or firmDepends on height: firm to mediumSoft, Medium, FirmMedium-firmFirm, Extra Firm (flippable: one side each)Firm, Extra Firm (flippable)FirmMediumSoft, Medium, FirmPlush, Medium, Firm, Builds: Hybrid or Lux Quilted HybridPlush, Medium, Firm, Internal split (King and Cal King): Med/Firm, Firm/Plush, Plush/MedPlush, Medium, Firm, Internal split (King and Cal King): Med/Firm, Firm/Plush, Plush/MedTwo-sided: medium side and firm side (sold as 'Medium/Firm')Medium (flip the two top foam layers inside the cover for softer or firmer)Medium (5.5 out of 10), Medium-Firm (8 out of 10), Dual Firmness (Medium/Medium-Firm)Medium (5.5 out of 10), Medium-Firm (8 out of 10)Each layer soft, medium, firm or extra firm, 'Best Seller' preset or 'Personalized', Split firmness on Queen, King and Cal KingLuxury PlushLuxury FirmPlushMediumLuxury FirmFirmLuxury FirmPlushMediumFirmMediumFirmSoft, Medium, FirmEach layer soft, medium, firm or extra firm, 'Best Seller' preset or 'Personalized', Split firmness on Queen, King and Cal KingFirm (10.5″), Medium (10.5″), Plush Euro Top (11.5″)Firm (8 out of 10 on Mattress Insider's scale)Medium (7 out of 10 on Mattress Insider's scale)FirmFirmMedium-firmMediumMedium-plushPlush
Height in Bunk (36 × 84)13.25″ or 14″6″ or 8″ or 10″ or 12″ or 14″13.25″ or 14.5″10″ or 12″ or 14″10″13″12″13″You choose14″ or 15″14″14″12″12.5″9″ or 10″ or 12″14″7″ or 9″ or 10″ or 13″18″17″16″15″14″13″13″16.5″15″14″14″14″12″7″ or 9″ or 10″ or 13″10.5″ or 11.5″You choose9.75″6″8″10″12″14″8″
How it’s soldReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeReady-madeMade to orderMade to orderMade to orderMade to orderMade to orderMade to orderMade to orderMade to orderMade to order
Returns365-night trial365-night trial365-night trial365-night trial365-night trial365-night trial365-night trial365-night trial365-night trial120-night trial365-night trial365-night trial365-night trial365-night trial365-night trial365-night trialReturnableReturnableReturnableReturnableReturnableReturnableReturnableReturnableReturnableReturnableReturnableReturnableReturnableNo returnsReturnable365-night trial365-night trial365-night trial120-night trial120-night trial120-night trial120-night trial120-night trial120-night trial
Good fit ifYou want a coil hybrid and a choice of firmnessYou need a very low profile: 6″ or 8″Cooling zoned hybridRV coil mattressVery firm, flippable foamVery firm, flippable hybridFirm plus-size hybridPlus-size side sleepersAthlete-marketed hybridHalf-Cal-King sizeSwap-the-feel pillow topLatex over coilsTwo feels, one flipAdjustable all-foamOrganic all-latexOrganic pillowtopBuild-your-own latex layersTallest, plushest PremiereHand-tufted luxury hybridHand-tufted luxury hybridHand-tufted luxury hybridHand-tufted luxury hybridHand-tufted luxury hybridHand-tufted luxury hybridLayered coils with wool and latexLayered coils with wool and latexLayered coils with wool and latexLayered coils with wool and latexLayered coils with wool and latexFirmness choice, odd sizesAdjustable latex, lower priceThree feels, edge supportFirm RV foamMedium RV foamThin RV bunks and odd bedsThin RV bunks and odd bedsRV bunks and odd bedsRV bedsRV bedsThin RV beds
Independent tests3 reviewers3 reviewers3 reviewers2 reviewers2 reviewers3 reviewers3 reviewers4 reviewers3 reviewers1 reviewer1 reviewer3 reviewers1 reviewer1 reviewer3 reviewers1 reviewer2 reviewersNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yet
Owner feedbackNot yetOwners of this modelOwners of this modelNot yetRelated model, not this exact oneNot yetNot yetNot yetNot yetNot yetRelated model, not this exact oneOwners of this modelOwners of this modelNot yetOwners of this modelNot yetRelated model, not this exact oneNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yetRelated model, not this exact oneMerchant-selected commentsNot yetNot yetNot yetNot yetNot yetNot yetNot yetNot yet
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Can’t find the right one?

A custom maker can build a bunk (36 × 84) mattress to your exact inches, including rounded or cut corners. Stores rarely keep this size on the floor.

Online stores that list 36 × 84

Stores whose own site lists this exact size. A listing isn’t proof it’s in stock; check before you order.

Every online store we track

What else you’ll need

Sheets

Look for fitted sheets sold as 36 × 84 with a pocket deeper than your mattress. Standard twin xl sheets won’t fit properly.

A base that fits

Your frame or foundation needs to support the full 36 × 84 footprint and meet the mattress maker’s slat-gap rules.

Check your base

A topper (optional)

Few toppers come in this size; a custom or slightly smaller one is common.

Topper fit guide

Make sure it’s really a bunk (36 × 84)

It is longer than a twin XL (38 × 80) and two inches narrower. Check both measurements.

Twin XL38 × 80″2″ wider, 4″ shorterCalifornia king72 × 84″Same length, 36″ widerRV bunk (30 × 80)30 × 80″6″ narrower, 4″ shorter

Questions about Bunk (36 × 84) mattresses

How big is a bunk (36 × 84) mattress?

36 inches wide and 84 inches long (91.4 × 213.4 cm). A 36 × 84-inch mattress fits some RV and cabin bunks. It is also the size of one half of a split California king, so two side by side make a 72 × 84 bed.

Will it fit my bed frame?

Measure the bunk or the half of the split base. For a split king, each side needs its own 36 × 84 mattress. It is longer than a twin XL (38 × 80) and two inches narrower. Check both measurements.

Can I return a bunk (36 × 84) mattress?

43 of the 44 Bunk (36 × 84) mattresses we list can be returned under the seller’s trial. Made-to-order mattresses often can’t. Each one’s return terms are in its details.

Where can I buy one?

Mostly online from the brands on this page, which ship to most US addresses. Local mattress factories can build one; stores rarely keep this size on the floor.

How much does it cost?

Prices change often, so we link to each seller instead of listing them. Odd sizes are often priced at or above the nearest standard size, and made-to-order ones usually cost more.

Are the owner reviews about this size?

Usually not. Owner feedback is about the mattress model, often in a more common size. Each summary says whether it’s about this exact model, and links to the source.

LET’S FIND YOUR FIT

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