Mattress Sizes Australia: The Definitive Guide to Dimensions, Space & Choosing the Right Fit
Choosing between different mattress sizes can feel simple at first—until you realise every size changes how your bedroom feels, functions, and flows. From compact singles to expansive super kings, each option is designed for different spaces and sleeping needs.
Whether you’re upgrading your main bedroom, fitting out a guest room, or moving into a new place, understanding exact mattress dimensions is essential to getting comfort and practicality right.
Key Takeaways
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Australian mattress sizes range from single to super king, with widths from 92cm to 204cm and lengths from 190cm to 203cm
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The right mattress size depends on your room dimensions, sleeping arrangement, and personal space needs
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The queen mattress is the most popular size in Australia
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King and super king mattresses offer maximum space and comfort for couples
Australian Mattress Sizes at a Glance
All mattress sizes in Australia follow a standard set of dimensions, making it easier to match mattresses and bed frames across brands. Below is a quick comparison of all major sizes used in Australian homes.
| Mattress Size |
Dimensions (cm) |
Dimensions (inches) | Best For |
| Single | 92 x 190 | 36 x 75 | Kids, teens, small rooms |
| King Single | 107 x 203 | 42 x 80 | Taller solo sleepers, narrow rooms |
| Double | 138 x 190 | 54 x 75 | Singles wanting space, couples in small rooms |
| Queen | 153 x 203 | 60 x 80 | Most couples, standard master bedrooms |
| King | 183 x 203 | 72 x 80 | Couples wanting extra space |
| Super King | 204 x 204 | 80 x 80 | Maximum space and luxury |
Mattress sizes follow standard Australian bedding dimensions used across major manufacturers
Quick size guide:
- Single = narrow sleep setup
- Double = compact couple option
- Queen = balanced standard
- King = spacious upgrade
- Super King = full luxury spread
Single Mattress Size
The single bed size in Australia measures 92cm x 190cm, making it the most compact standard mattress available.
A single mattress size is designed for individual sleepers and works best in small bedrooms, children’s rooms, or shared spaces where floor area is limited. Despite its smaller footprint, it still provides enough length for most teenagers and adults under average height.
Single mattresses typically require only a small room footprint, leaving space for study desks, toy storage, or wardrobes. This makes them ideal for maximising functionality in tight layouts.
Key benefits:
- Fits easily in small bedrooms (around 2.4m x 3.0m or larger)
- Leaves more floor space for furniture and movement
- Budget-friendly and easy to furnish around
Furniture compatibility is straightforward—single bed frames are widely available, including minimalist platform styles and storage beds. A single mattress also pairs well with compact bedside tables or shelving units without overcrowding the room.
Double Mattress Size
The double bed size measures 138cm x 190cm, offering significantly more width than a single, while remaining compact enough for smaller rooms.
A double mattress size is best suited for solo sleepers who want extra room or couples who are comfortable sharing a tighter sleeping space. It is also commonly used in guest rooms due to its versatility.
Compared to a queen, a double is 15cm narrower and slightly less spacious overall. That difference becomes noticeable for couples who move frequently during sleep.
Comparison insight:
- Double = compact and space-saving
- Queen = more personal space and long-term comfort
Typical room configurations include:
- Small master bedrooms in apartments
- Guest bedrooms with multi-use layouts
- Studio-style living spaces
A double bed works best in rooms where you still want walking space around the bed, ideally allowing at least 50cm clearance on one or two sides.
Queen Mattress Size
The queen bed size is 153cm x 203cm, making it the most popular mattress size in Australia.
A queen mattress size is widely considered the “sweet spot” because it balances comfort and space efficiency. It comfortably fits two adults while still working in most standard Australian bedrooms.
This size works particularly well in rooms around 3.6m x 3.0m or larger, leaving enough space for bedside tables and movement.
Why Australians prefer queen size:
- Ideal balance between space and practicality
- Fits most standard master bedrooms
- Comfortable for couples without overwhelming the room
Room layout example:
- Queen bed centred on the longest wall
- Two bedside tables (40–60cm each)
- Minimum 50cm walking space on each side where possible
Furniture placement tips:
- Use low-profile bed frames to enhance space perception
- Keep wardrobes on adjacent walls to avoid congestion
- Choose under-bed storage if floor space is limited
Explore our mattress range in all sizes, including Koala queen mattresses and matching Koala bed frames designed for Australian homes.
King Mattress Size
The king bed size measures 183cm x 203cm, offering significant additional width compared to a queen.
A king mattress size is designed for couples who prioritise personal sleeping space. Each person gets more room to move without disturbing the other, making it ideal for light sleepers or those sharing a bed long-term.
Room requirements:
A king bed typically suits bedrooms at least 3.8m x 3.6m or larger to ensure comfortable movement and furniture spacing.
Benefits:
- Extra width for each sleeper
- Reduced sleep disturbance between partners
- Premium, spacious bedroom feel
A king mattress also creates a luxury hotel-style atmosphere, especially when paired with a low-profile or upholstered bed frame.
Koala king mattresses and Koala king bed frames are designed to maximise both comfort and support while maintaining a clean, modern look suited to Australian interiors.
King Single Mattress Size
The king single bed size measures 107cm x 203cm, making it a uniquely Australian mattress size that sits between a single and a double.
A king single mattress size is ideal for taller solo sleepers who need extra legroom without upgrading to a double bed. It is especially useful in narrow rooms where width is limited but length is important.
Key advantages:
- Extra length compared to a standard single
- Narrow enough for compact bedrooms
- Perfect for growing teens or solo adults
Compared to a standard single:
- Wider by 15cm
- Much better for long-term comfort
- Still space-efficient in smaller rooms
King singles mattresses are commonly used in student accommodation, smaller apartments, and multi-purpose rooms.
Super King Mattress Size
The super king bed size is 204cm x 204cm, making it the largest standard mattress size available in Australia.
A super king mattress size is designed for maximum luxury and space. It provides exceptional room for couples who want the highest level of comfort, especially in large master bedrooms.
Space requirements:
Super king beds work best in rooms at least 4.2m x 4.2m or larger to maintain proper circulation space.
Benefits:
- Maximum sleeping surface available
- Ideal for couples with children or pets sharing the bed
- Premium hotel-style comfort at home
This size is best suited for large homes where bedroom space is not limited. It creates a strong visual focal point and delivers a high-end sleeping experience.
Explore Koala super king mattresses designed for generous comfort and modern Australian interiors.
How to Measure Your Room for a Mattress
Measuring your room correctly ensures your chosen mattress fits comfortably without overcrowding the space.
Start by measuring the full length and width of your bedroom wall-to-wall. Then subtract the space needed for movement and furniture.
Step-by-step guide:
- Measure room length and width in centimetres
- Mark intended the bed placement
- Allow at least 50cm clearance on each accessible side
- Factor in wardrobe and drawer openings
- Check door swing direction and entry pathways
Furniture clearance considerations:
- Bedside tables (40–60cm each)
- Wardrobe doors or sliding panels
- Walking paths (minimum 50cm recommended)
Tools needed:
- Tape measure
- Floor plan sketch (paper or digital)
- Painter’s tape for visualising bed placement
A well-measured room prevents cramped layouts and ensures your mattress enhances rather than dominates the space.
Mattress Size vs. Bed Frame Size
Matching your mattress size to the correct bed frame is essential for both comfort and safety.
A mattress should always align exactly with its corresponding bed frame size. Even small mismatches can affect stability, aesthetics, and sleep quality.
Comparison guide:
|
Mattress Size |
Compatible Bed Frame |
|
Single |
Single frame |
|
King Single |
King single frame |
|
Double |
Double frame |
|
Queen |
Queen frame |
|
King |
King frame |
|
Super King |
Super king frame |
Common sizing mistakes:
- Placing a queen mattress on a double frame (overhang risk)
- Assuming the king and queen frames are interchangeable
- Not checking internal frame dimensions before purchase
Why correct sizing matters:
- Ensures structural support
- Prevents mattress movement
- Maintains warranty conditions
- Improves sleep comfort and durability
Explore Koala bed frames designed to match all standard Australian mattress sizes, along with the full Koala mattresses collection for a complete sleep setup.
For deeper comparisons, see our guides on Best Mattress Australia and our Bed Frame Buying Guide.
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Time to find your fit?
Once the size is sorted, the next decision is comfort. Every Koala mattress is built around Kloudcell® open-cell foam, backed by our 120 day trial and 10-year warranty.
Shop the Koala mattress range.
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