Sofa Bed Dimensions & Size Guide

Sofa bed dimensions in Australia vary by size, but a Queen sofa bed typically opens to around 153 × 203 cm (matching a Queen mattress), folds to a sofa about 200 to 220 cm long by 100 cm deep, and needs 60 to 80 cm of clearance in front to open cleanly. Single, King Single and Double sofa beds are smaller across all three dimensions. Below we cover folded vs open dimensions for each common size, how much floor space you actually need to open a sofa bed, whether a sofa bed is the same size as a double bed, and how to measure your room for one.

Key Takeaways

• A Queen sofa bed typically opens to around 153 × 203 cm (matching a Queen mattress), folds to a sofa about 200 to 220 cm long by 100 cm deep

• Single, King Single, Double and Queen are the four common AU sofa bed sizes; each has its own folded and open dimensions

• You need 60 to 80 cm of clearance in front for a fold-out or pull-out sofa bed to open; 30 to 40 cm for a click-clack (backrest tilts back only)

• A Queen sofa bed is bigger than a Double bed (Queen 153 × 203 cm vs Double 137 × 188 cm); sofa bed sizes follow standard AU mattress sizing when open

• Always measure both folded and open dimensions against your room before ordering, plus doorway width for delivery

Sofa Bed Dimensions by Size (Folded & Open, in cm)

Sofa bed dimensions in Australia follow standard mattress sizing when open, plus a folded footprint that varies by design (fold-out, pull-out, click-clack, or FlipBed™ mechanisms all fold differently). Here's the industry-typical range for each size, with folded (sofa mode) and open (bed mode) dimensions.

These are industry-typical ranges. Specific models vary by 5 to 15 cm in each dimension depending on the mechanism, frame design and arm width, so always confirm the exact measurements against your target room before ordering.

Single & King Single Sofa Bed Dimensions

Single sofa beds open to about 92 × 188 cm (matching a Single mattress) and fold to roughly 180 × 90 cm in sofa mode. King Single sofa beds open to about 107 × 203 cm (matching a King Single mattress) and fold to roughly 200 × 95 cm. Both suit solo sleepers, teens, and compact spaces where a Double or Queen would dominate the room.

Common use cases:

• Kids' rooms for sleepover-ready double duty

• Compact studios where a Double or Queen sofa bed would overwhelm the space

• Home offices doubling as guest rooms for one occasional visitor

• Teenagers' bedrooms transitioning from single beds without needing a permanent Queen

Single sofa beds fit through a standard AU doorway (76 to 82 cm) with room to spare; King Single is tighter and should be measured carefully against your delivery path.

Double Sofa Bed Dimensions

Double sofa beds open to about 137 × 188 cm (matching a Double mattress) and fold to roughly 200 × 95 cm in sofa mode. Double is the middle ground between King Single (solo) and Queen (couple), suiting one adult who prefers more sleep space or occasional couple use.

Common use cases:

• Primary sleep for a solo adult who wants more space than a Single or King Single

• Occasional couple guest use (a Double works but is tighter than a Queen for two adults)

• Compact rooms where a Queen sofa bed's footprint doesn't fit but a Single feels too small

Double sofa beds folded footprint (200 × 95 cm) is similar to King Single because the folded sofa dimensions are driven by the frame rather than mattress width, so the storage benefit over King Single is minimal.

Queen Sofa Bed Dimensions

Queen sofa beds open to about 153 × 203 cm (matching a Queen mattress) and fold to roughly 220 × 100 cm in sofa mode. Queen is the standard size for couple bedding in Australia, and it's the largest common sofa bed size for residential use.

Common use cases:

• Couples' primary bedding in a bedroom or studio flat

• Design-led living rooms where the sofa bed is the primary sofa

• Airbnb hosts who want a genuine Queen-bed experience for couple guests

• Home offices with room to accommodate a full Queen footprint when open

Our Koala Sofa Bed sits in the Queen sofa bed category with its full-size Kloudcell® mattress and FlipBed™ mechanism for one-motion conversion. Verified from the Koala AU product page:

Koala Sofa Bed (4th Gen) dimensions (all variants):

• Depth (sofa mode): 104.5 cm

• Depth (opened, bed mode): 225.5 cm

• Seat height: 85 cm

• Seat depth: 90 cm (deep 60 cm seat with multi-layer comfort)

• Arm height: 58 cm

Width by variant:

• 3-Seater: 177 cm wide, 72 kg

• 2.5-Seater: 152 cm wide, 66 kg

• 1.5-Seater: 117 cm wide, 51.5 kg

Key features:

• FlipBed™ mechanism for sit-to-sleep in seconds, no tools required

• Deep 60 cm seat with angled backrest and lumbar support (60 cm seat is 11% deeper than the 3rd Gen's 54 cm seat)

• Full-size mattress with Kloudcell® topper for real bed comfort

• Removable, washable, upgradable, water-resistant covers

• Reversible ottoman option (cushion top or wooden table top; sold separately)

• From $1,790 AUD (RRP for the 3-Seater; pricing varies by variant and fabric)

The Koala Sofa Bed 4th Gen ships flat-pack in 4 to 5 boxes depending on the variant, so it fits through standard AU doorways (76 to 82 cm wide) even on the 3-Seater. See the product page for exact boxed dimensions per size. Always confirm current published dimensions and pricing on the product page before ordering.

How Much Space You Need to Open a Sofa Bed Fully

You need 60 to 80 cm of clearance in front of a fold-out or pull-out sofa bed for the mechanism to open cleanly, and 30 to 40 cm for a click-clack (which tilts the backrest rather than extending forward). Add 20 to 30 cm on either side for comfortable access to the sleep surface and mechanism handles.

Space requirements by mechanism:

• Fold-out (metal action): 60 to 80 cm front clearance; the mattress unfolds forward from the sofa base

• Pull-out: 60 to 80 cm front clearance; the frame slides out on rails

• FlipBed™: 40 to 60 cm front clearance; the one-motion flip is compact vs traditional pull-out

• Click-clack: 30 to 40 cm rear clearance for the backrest to tilt back; no forward extension needed

• Side clearance: 20 to 30 cm on both sides for access, cushion removal, and daily comfort

Practical layout tip: mark the open sofa bed's footprint on the floor with masking tape before you order. Include the sofa's folded dimensions plus the open-mode extension in whichever direction the mechanism opens. This confirms the piece fits both modes cleanly in your room.

Is a Sofa Bed the Same Size as a Double Bed?

Not exactly. A Double sofa bed opens to Double mattress size (137 × 188 cm), but sofa bed sizing includes four common sizes (Single, King Single, Double, Queen), so "sofa bed" is a category, not a size. A Queen sofa bed is larger than a Double bed; a King Single sofa bed is different again from a Double.

Size comparisons:

• Sofa bed (Single) vs Double bed: sofa bed is smaller (92 × 188 vs 137 × 188)

• Sofa bed (King Single) vs Double bed: sofa bed is narrower but longer (107 × 203 vs 137 × 188)

• Sofa bed (Double) vs Double bed: identical open dimensions (137 × 188)

• Sofa bed (Queen) vs Double bed: sofa bed is bigger (153 × 203 vs 137 × 188)

When shopping, "sofa bed size" refers to the open bed dimensions. If you want the sleep surface of a Double bed, buy a Double sofa bed. If you want more sleep space than a Double bed, step up to Queen.

How to Measure Your Room for a Sofa Bed

Measure your room for a sofa bed by mapping both the folded (sofa mode) and open (bed mode) footprints on the floor, checking clearance around the sofa in both modes, and confirming your doorway and hallway can accommodate the delivery. A 15-minute measurement session before ordering prevents delivery-return issues.

Measurement checklist:

• Sofa mode footprint: mark the folded L × D dimensions on the floor with masking tape (Queen: about 220 × 100 cm)

• Bed mode extension: mark the mechanism extension in the opening direction (60 to 80 cm forward for fold-out, 30 to 40 cm rear for click-clack)

• Total open footprint: combined folded + extension, matches the mattress dimensions in the opening direction

• Side clearance: 20 to 30 cm on both sides for daily access and cushion removal

• Traffic flow: 60 to 80 cm clearance for walking around the sofa when in sofa mode

• Doorway width: standard AU front doors are 76 to 82 cm; measure the narrowest point of your delivery path

• Hallway turning: for a piece over 180 cm long, measure any right-angle turns in the delivery path

• Ceiling height on stairs: low ceilings above staircases can restrict how a sofa bed can be tilted for delivery

• Lift access (if flat): measure lift internal dimensions if the sofa bed can't fit up the stairs

Cross-check the sofa bed's boxed delivery dimensions (not just the assembled size) against every measurement. Flat-pack sofa beds (like our Koala Sofa Bed) ship in multiple boxes that fit through smaller openings; fully-assembled sofa beds arrive as one piece and require the full assembled dimensions to fit.

Explore Our Sofa Bed Range

Our Koala sofa bed range includes options across different sizes and use cases, all engineered for Australian rooms with tool-free operation and delivered in flat-pack sections for easier access. Explore the range:

• Koala Sofa Bed: our flagship 4th Gen with FlipBed™ mechanism and full-size Kloudcell® mattress in a Queen-size sofa bed configuration.

• Byron Sofa Bed: our Queen-size sofa bed option.

• Wanda Sofa Bed: an alternative sofa bed design in our range.

• Sofa Bed: our sofa bed product page.

Browse our full sofa bed range or our 3-seater sofa bed collection to compare all options. Confirm exact dimensions on each product page before ordering.