A double bed mattress size in Australia measures 138 cm wide x 188 cm long. In simple terms, it sits between a single and a queen mattress, offering more sleeping space than a single bed without taking up as much room as larger options. The main reason Australians choose a double bed mattress size is that it provides a comfortable balance of space, affordability and practicality, especially for teenagers, guest rooms, apartments and compact master bedrooms.
Here’s why this mattress size continues to be popular: it suits solo sleepers who want extra room to stretch out, fits well in smaller bedrooms, and works seamlessly with a wide range of bed frames and bedroom layouts found in Australian homes.
Double Bed Mattress Size Dimensions Explained
Understanding the exact measurements helps you plan your bedroom layout properly.
Standard Australian Double Mattress Dimensions
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Width: 138 cm
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Length: 188 cm
This size is shorter than queen and king mattresses, which is worth noting for taller sleepers.
Who Is the Double Bed Mattress Size Best For?
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Solo adults who want extra width
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Teenagers and growing children
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Guest bedrooms
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Apartments and smaller homes
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Secondary bedrooms or study-bedroom combinations
In simple terms, a double bed mattress size offers generous width but moderate length, making it a versatile and space-efficient option.
Types & Styles of Double Bed Mattresses in Australia
Double bed mattresses are available in a wide range of constructions and comfort styles to suit Australian lifestyles and climates.
1. Innerspring Double Mattresses
Traditional coil systems that provide support and airflow. These are durable, widely available and often more affordable.
2. Pocket Spring Double Mattresses
Individually wrapped springs reduce motion transfer and improve body contouring. Ideal for shared use or restless sleepers.
3. Memory Foam Double Mattresses
Designed to mould to the body for pressure relief. These are popular for solo sleepers seeking comfort and reduced joint stress.
4. Latex Double Mattresses
Naturally breathable and resilient, latex mattresses suit warm Australian climates and people who prefer responsive support.
5. Hybrid Double Mattresses
A combination of foam and springs, offering balanced support, comfort and durability.
6. Firm vs Medium vs Plush
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Firm: Ideal for back sleepers or those who prefer strong support
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Medium: A versatile choice for most sleepers
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Plush: Softer comfort for side sleepers
Each mattress type delivers a different sleep experience, but all are designed to fit the same standard double bed mattress size.
How to Choose a Double Bed Mattress Size
Choosing the right mattress isn’t just about dimensions — it’s about how you sleep, where the bed will go and who will use it. Here’s a practical Australian buyer’s guide.
Step 1: Measure Your Bedroom
Ensure there’s enough clearance for:
A double bed mattress size works well in bedrooms from 3 m x 3 m and above.
Step 2: Consider the Sleeper
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Solo adult: Excellent choice
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Teenager: Comfortable for long-term use
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Couple: Suitable short-term, but may feel narrow for nightly use
Step 3: Think About Height
At 188 cm long, taller sleepers (over 185 cm) may prefer a queen for extra legroom.
Step 4: Choose the Right Mattress Thickness
Standard thickness ranges from 20–35 cm. Thicker mattresses often feel more luxurious but may require deeper fitted sheets.
Step 5: Match with the Right Bed Frame
Ensure your bed frame is designed specifically for an Australian double mattress to avoid overhang or poor support.
Step 6: Factor in Bedding Availability
Double bed mattress size sheets, protectors and doonas are widely available across Australia, making it easy to style and maintain.
By following these steps, you’ll ensure your double bed mattress size suits both your space and your sleep needs.
Benefits & Use Cases of a Double Bed Mattress Size
The double bed mattress size remains a popular choice for good reason. Here’s why Australians continue to buy it.
Key Benefits
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Space-efficient: Fits comfortably in smaller bedrooms
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Cost-effective: More affordable than queen or king sizes
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Comfortable for solo sleepers: Extra width without excess bulk
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Versatile: Works for teens, adults and guests
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Easy to style: Wide availability of bedding and frames
Common Use Cases
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Teen bedrooms: Grows with them into adulthood
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Guest rooms: Comfortable without overwhelming the space
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Apartments: Ideal for urban living
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Study-bedroom hybrids: Balances functionality and comfort
In simple terms, a double bed mattress size offers maximum comfort for one person with minimal space compromise.
Double Bed Mattress Size at House of Isabella Australia
At House of Isabella Australia, we understand that the right mattress size forms the foundation of a well-designed bedroom. While the mattress itself is essential, the surrounding furniture, bedding and styling complete the experience.
Here’s why Australians choose House of Isabella for bedroom solutions that complement a double bed mattress size:
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Buy Now, Pay Later with Afterpay & Zip
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Fast delivery Australia-wide from East & West Coast warehouses
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Large in-stock catalogue of bedroom furniture and décor
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Exclusive, unique designs curated for Australian homes
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Australian-based customer care for expert guidance
Our collections pair beautifully with bedroom aesthetics inspired by Florabelle Collection, Zaffero, Emac & Lawton, Gallery Home, Café Lighting & Living and OneWorld Collection — referenced here for design context only. Whether you’re styling a guest room or upgrading a teen’s bedroom, a double bed setup can feel refined, intentional and comfortable.
Double Bed Mattress Size Trends for 2025 (Australia)
Here’s how Australians are using and styling double bed mattress sizes in 2025:
1. Elevated Guest Bedrooms
More homeowners are investing in high-quality double mattresses to create hotel-style guest rooms that feel welcoming, not secondary.
2. Teen-to-Adult Transition Beds
Parents are choosing double beds earlier, avoiding the need to upgrade from single to queen later.
3. Compact Luxury Living
Urban living trends favour well-designed smaller bedrooms with double beds styled luxuriously rather than oversized furniture.
4. Layered Bedding Looks
Australians are styling double beds with oversized doonas, throws and cushions for a plush, designer feel.
5. Neutral, Timeless Aesthetics
Soft whites, warm greys and natural textures dominate, making double beds feel spacious and calming.
These trends reflect a broader move toward intentional sizing, thoughtful design and long-term value.
Styling Advice for a Double Bed Mattress Size
Styling a double bed well can make a room feel larger and more luxurious.
1. Use Oversized Bedding
A queen doona on a double bed creates an elegant drape and visual softness.
2. Choose Slim Bedside Tables
This maximises floor space and keeps the room balanced.
3. Layer Thoughtfully
Combine fitted sheets, a tailored cover, a throw at the foot of the bed and 2–4 cushions for depth.
4. Keep the Colour Palette Light
Light neutrals help the room feel more open, especially in smaller spaces.
5. Add Vertical Interest
Use tall lamps, artwork or a statement headboard to draw the eye upward.
6. Prioritise Function
Ensure drawers, wardrobes and doors open easily around the bed — good flow matters as much as style.
With the right approach, a double bed mattress size can feel just as refined as larger options.
Related Glossary Terms
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Mattress sizes Australia
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Queen bed mattress size
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Bed frames
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Bedroom furniture
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Bedding sizes
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Guest room styling
Disclaimer
Mentions of brands such as Florabelle Collection, Zaffero, Emac & Lawton, Gallery Home, Café Lighting & Living and OneWorld Collection are included purely for descriptive and contextual purposes. House of Isabella Australia is not affiliated with, endorsed by, or associated with these brands.
