A rollaway bed is a folding steel frame on casters with a thin mattress attached, and it comes in three practical widths: cot width at about 30–31 in (76–79 cm), twin width at 38–39 in (97–99 cm), and true full at 54 in (137 cm) — nearly all of them 74–75 in (188–191 cm) long. Folded, a typical one parks upright in a footprint around 40 in wide by 17 in deep (102 × 43 cm) and roughly 49 in tall (125 cm), or lies flat at about 33 × 31 × 13 in (84 × 79 × 33 cm) on cot-width models. Weight capacity is the number that separates a bed your brother-in-law can sleep on from one that folds in the middle: budget frames are often rated near 265 lb (120 kg), while commercial-grade steel models list 440–500 lb (200–227 kg).

If you only remember one thing: measure the closet or gap where it will live before you shop, not after the box arrives.

Rollaway bed sizes and folded dimensions

Manufacturers publish two sets of numbers and people buy the wrong bed by reading only one. Open dimensions tell you whether it fits the floor. Folded dimensions tell you whether you can live with it the other 51 weeks of the year.

Type	Sleep surface (in)	Sleep surface (cm)	Open height	Typical folded size	Best for
Cot width (hotel style)	30–31 × 74–75	76–79 × 188–191	15–18 in (38–46 cm)	About 49 H × 40 W × 17 D in (125 × 102 × 43 cm) upright	One adult, narrow rooms, hallway storage
Twin width	38–39 × 75	97–99 × 191	10–18 in (25–46 cm)	About 44 × 39 × 12 in (112 × 99 × 30 cm) folded flat	Most guests; takes standard twin sheets
Full width	54 × 75	137 × 191	15–18 in (38–46 cm)	Roughly 54 in (137 cm) wide folded — needs a deep closet	Two adults on short stays
Extra-long / adjustable-back	30–32 × 75	76–81 × 191	15 in (38 cm) typical	Similar to cot width but taller when upright, around 52 in (132 cm)	Reading, recovery, sitting up in bed

Two real examples. A common import model lists an open size of 79 × 31.5 × 18 in, folded 33 × 31 × 13 in, net weight 37 lb (17 kg), capacity 265 lb (120 kg). A hotel-style commercial unit lists a 31.5 × 78.7 × 15.25 in frame with a 31 × 74 × 5.25 in mattress. Notice the frame runs several inches longer than the sleeping surface — that overhang is why the bed won’t fit the closet you measured for a mattress.

Will it fit your closet, door and stairs?

Take five measurements before you buy anything:

• Closet depth and width where it will be stored, plus the clear height under the shelf.
• Narrowest doorway on the route, measured between the stops with the door open — interior doors vary more than people expect, so measure rather than assume.
• Stair landing turn: the diagonal of the folded bed has to swing through it. A 49 in (125 cm) folded height is the number that gets stuck on a half-landing.
• Open floor area plus a walkway. Design guidance commonly puts a comfortable walkway at 30–36 in (76–91 cm), and you need that on at least one long side so nobody climbs over the foot of the bed at 2 a.m.
• Sloped ceilings in attic rooms — an 18 in (46 cm) deck sits far higher than a floor mattress.

Bed size chart: how a rollaway compares with standard beds

Anyone shopping fold-away beds ends up asking a second question: how does this compare with a standard bed? Here are the U.S. standard sizes, consistent across most brands within an inch.

Size	Inches (W × L)	Centimetres	Room size that works
Cot / rollaway	30–31 × 75	76–79 × 191	Fits where nothing else will; needs about 7 × 5 ft of floor
Twin	38 × 75	96.5 × 190.5	7 × 10 ft and up
Twin XL	38 × 80	96.5 × 203	Dorms, sleepers over 6 ft
Full (double)	54 × 75	137 × 190.5	9 × 10 ft and up
Queen	60 × 80	152 × 203	10 × 10 ft and up
King	76 × 80	193 × 203	12 × 10 ft and up
California King	72 × 84	183 × 213	12 × 12 ft; longest standard size

The comparison that surprises people: a king and a California king have almost the same surface area. Sleep Foundation’s king size breakdown notes the Cal king is narrower and longer — four inches traded in each direction, so it’s a different shape rather than a bigger bed. A useful planning rule from mattress-size guides is to leave roughly 24 in (61 cm) of clearance on each side of a permanent bed.

Against that, a cot-width rollaway gives a single adult about 30 in (76 cm) of width — the same shoulder room a child gets on a twin, minus eight inches. That’s fine for two nights. It’s cramped for two weeks.

Mattress thickness and type: what’s comfortable past one night

Thickness on these beds runs 3 to 5.25 in (7.5–13 cm), and the difference between the bottom and top of that range is the whole experience.

• 3 in (7.5 cm) foam: emergency use. Side sleepers will feel the deck through it by morning because hips and shoulders bottom out.
• 4 in (10 cm) foam: the common middle. Acceptable for a weekend if the sleeper is under about 180 lb (82 kg) and sleeps on their back.
• 5–5.25 in (13 cm) foam or innerspring: what commercial suppliers ship to hotels. This is the minimum for a side sleeper or anyone staying a week.

Type matters less than density. Cheap open-cell foam compresses into a permanent dish within a season of regular use; denser foam and small-coil innersprings hold shape longer. Innersprings feel more like a real bed and breathe better in humid rooms; foam is quieter and packs flatter. Neither will match the mattress you sleep on nightly.

One cheap upgrade beats the rest: a 2 in (5 cm) topper plus a protector. That takes a 4 in pad to a usable 6 in and gives you something washable between guests. Weighing firmness for a guest with back trouble? Our mattress firmness scale guide explains what the numbers mean.

Frame and weight capacity: tubular steel, hinges and the sag line

Every rollaway bed folds at the middle, which is exactly where your hips go. That hinge is what fails. What to read on the spec sheet:

• Tube gauge. Commercial frames are often described as 1 in tubing in 16-gauge steel; lighter consumer models use 20-gauge. Lower gauge number means thicker wall and less flex.
• Deck type. Woven link spring, polypropylene mesh deck, or wooden slats. Polypropylene decks are marketed as snag-, squeak- and rust-resistant, which matters in a damp basement. Slats feel firmer but can crack at the centre joint.
• Centre support. A cross brace or an extra pair of legs at the hinge is the single best predictor of whether the bed sags. If the photos show only four corner legs on a 75 in frame, expect a dip.
• Rated capacity. Published figures run from about 265 lb (120 kg) on light import frames to 440–500 lb (200–227 kg) on reinforced steel models, with full-size folding beds around 450 lb (204 kg). Treat the rating as a static limit, not a target — leave headroom for someone sitting down hard on the edge.

Edge support is the unlisted spec. Sitting on the side rail puts the whole load on one tube, which is how legs bend — give guests a chair.

Best rollaway beds by use: occasional guests, caregivers, dorms and rentals

Two or three guests a year

A cot- or twin-width frame with a 4–5 in foam pad and a 265 lb+ rating is enough. Prioritise folded size and weight — under 40 lb (18 kg) means one person can wrestle it out of a closet alone. Skip the adjustable backrest; you won’t use it.

A guest who stays for weeks, or a caregiver sleeping over

Move up to a 5 in innerspring on a reinforced frame with centre support, and add a topper. Honestly, at this point look hard at alternatives: a trundle bed or a wall bed gives a real mattress for similar money. Our guide to Murphy bed mattresses covers the thickness limits those frames impose.

Dorms, bunkhouses and short-term rentals

Buy commercial grade: zinc-plated or powder-coated tubing that won’t pit, a mattress stating compliance with U.S. and California flammability rules, replaceable casters. Rental hosts, check your listing rules too — a fold-away bed doesn’t change a unit’s legal sleeping capacity.

Tall sleepers

The honest limitation: almost every rollaway bed is 74–75 in (188–191 cm) long, and models sold as “extra long” are usually taller folded rather than longer open. Anyone over about 6 ft 1 in (185 cm) hangs off the end. Twin XL at 38 × 80 in fixes it — and it isn’t a fold-away format.

Wheels, locks and floor protection on hardwood

Casters come two ways. Four 360° swivel casters steer easily through a hallway one-handed. Commercial units often mix sizes — large 8 in fixed wheels at one end, 5 in casters at the other — which tracks straighter over thresholds and carpet edges.

Three things to check:

• At least two locking casters. Without them the bed drifts every time someone rolls over. If yours has none, wedge the legs against a wall or baseboard.
• Wheel material. Hard nylon and steel casters mark hardwood and vinyl plank; rubber or polyurethane wheels are gentler, and felt caster cups are the cheap retrofit.
• Grit. A caster that picks up grit becomes a sanding tool — wipe the wheels after garage storage.

Rollaway vs folding cot vs air mattress vs sofa bed

Option	Setup time	Comfort for 3+ nights	Stored footprint	Main weakness
Rollaway bed	1–2 minutes, no tools	Fair to good with a 5 in mattress plus topper	Bulky but thin: about 40 × 17 in (102 × 43 cm) upright	Hinge sag at the hips; short 75 in length
Folding camp cot	2–5 minutes, can be stiff	Poor to fair; narrow and taut	Smallest — often bag-sized	Fabric deck, low width, no real mattress
Air mattress	3–5 minutes with a pump	Poor over time; pressure drops overnight as air cools	Tiny when deflated	Seam failures, cold from below, noisy
Sofa bed	Under a minute	Good on quality models with a proper mattress	None extra — it’s furniture	Cost, weight, and the classic bar across the back

Choose by frequency. Under five guest-nights a year, an air mattress plus good bedding is the rational buy. Five to thirty nights, a rollaway bed earns its closet space. Over thirty, or any nightly use, buy furniture — a sofa bed or a trundle. If the room doubles as living space, our roundup of small-living-room sofas is worth reading first.

Bedding that actually fits a rollaway bed

This trips up almost everyone, because a rollaway mattress is standard in length and odd in width and depth.

• Cot width (30–31 in / 76–79 cm): twin fitted sheets are 7–8 in too wide and will billow. Look for cot-size or “roll-away” sheets, or use a twin flat sheet tucked hospital-style.
• Twin width (38–39 in / 97–99 cm): standard twin sheets fit the footprint. Because the mattress is only 4–5 in (10–13 cm) deep and most fitted sheets are cut for 10–14 in, you’ll have slack — sheet suspenders solve it for a few dollars.
• Full width (54 in / 137 cm): full/double sheets work, same depth caveat.
• Mattress protector: get the thin waterproof kind. It also keeps the foam from absorbing humidity in storage.
• Duvets and pillows: a twin duvet on a cot-width bed drags on the floor. A twin-size quilt or a large throw looks better and washes easier. For how pillow covers are sized, see our guide to shams.

Setup, storage and keeping the mattress from going musty

Foam stored folded in a closed closet is a moisture trap. The EPA’s guidance on mold and moisture in homes is to keep indoor relative humidity below 60%, ideally between 30% and 50%. Damp basements and unheated garages routinely sit above that, which is how a bed comes out smelling like a cellar.

What works:

1. Air it out after every use. Leave the bed open a few hours before folding.
2. Store upright, not flat under boxes. Compressed foam dries slowly and holds creases.
3. Leave a gap from the wall. Airflow on both faces beats a sealed plastic bag, which traps moisture inside.
4. Use a breathable cover — cotton, not plastic sheeting.
5. Skip the bare basement floor. If that’s the only option, raise it on a pallet.

Deal with spills the same day — a thin foam pad soaks through to the deck fast. Our walkthrough on getting urine out of a mattress covers foam specifically.

Care and lifespan: what fails first

In rough order: the mattress goes soft in the middle, then the casters crack or seize, then the hinge hardware loosens, then a leg bends because someone sat on the rail. The steel frame outlasts all of it.

Three habits that add years:

• Tighten the bolts once a year. Folding stress backs fasteners out. Five minutes with a wrench.
• Rotate the mattress pad end-to-end each time you store it, so the same section isn’t always under the heaviest load.
• Silicone spray on the hinge, not oil — oil attracts grit and stains bedding.

Realistic lifespan: two to four years for a light consumer model used a dozen nights a year, closer to a decade for a commercial steel frame with a replaceable mattress. Foam ages on a clock as well as under load — the same reason your main mattress has a replacement window.

A note on prices

No dollar figures here — folding-bed pricing swings with import costs and promotions, so any number printed today is wrong by spring. The tiering holds, though: light import frames with a 3–4 in pad at the bottom, reinforced twin-width frames with 5 in mattresses in the middle, commercial 16-gauge steel with innersprings at the top.

Before you buy: the short checklist

• Folded dimensions vs your closet, door and stair landing — all three.
• Rated weight capacity with headroom above your heaviest likely guest.
• Mattress thickness of 5 in (13 cm) if anyone will sleep on it more than two nights.
• Centre support at the hinge, and at least two locking casters.
• Frame weight under about 45 lb (20 kg) if one person will move it alone.
• Whether replacement mattresses and casters are sold separately.

FAQ

What size is a standard rollaway bed?

Most are 30–31 in wide by 74–75 in long (76–79 × 188–191 cm), with twin-width versions at 38–39 in (97–99 cm) and true full versions at 54 in (137 cm). Length is almost always 75 in, regardless of width.

Can you sleep on a rollaway bed every night?

You can, but the mattress is the limit, not the frame — a 4 in pad compresses at the hips within months of nightly use. If it’s your main bed, a folding frame with a proper 6–8 in mattress, a trundle or a wall bed serves you far better. Our trundle bed mattress guide covers thickness limits on low-clearance frames.

Do rollaway beds fit through a normal doorway?

Folded upright, a standard unit is roughly 40 in wide and 17 in deep (102 × 43 cm), so it clears most doors sideways. Stair landings and narrow casings are the tight spots. Measure between the door stops, not the outside of the frame.

What sheets fit a rollaway bed?

Twin-width models take standard twin sheets with some slack, since the mattress is only 4–5 in deep. Cot-width models need cot-size sheets or a tucked flat sheet; a twin fitted sheet will be several inches too wide.

Rollaway bed or air mattress for a weekend guest?

For a night or two a year, an air mattress costs less and stores smaller. For several guest weekends, the rollaway wins on setup speed, warmth and not deflating at 4 a.m. — and it gets sleepers off the floor, which older guests appreciate.

How much weight can a folding guest bed hold?

Published ratings range from about 265 lb (120 kg) on light consumer frames to 440–500 lb (200–227 kg) on reinforced commercial ones. Those are static ratings for a person lying down; sitting hard on the side rail concentrates the load and is the usual cause of a bent leg.

Updated September 2026.