Bed Sizes in Australia - Mattress Dimensions, Room Size & How to Choose

Buying a mattress can feel simple… until you hit the question: what size should I get?
Too small, and you’ll spend the night shuffling around like you’re trying not to fall off a narrow path. Too big, and your bedroom can start to feel like it’s all bed and no life.

This guide breaks down standard Australian mattress sizes, shows you the dimensions in cm, mm, and inches, and helps you pick the right one for your body, your sleep style, and your room.

Mattress Bed Size Chart with Dimension

Australian mattress sizing is fairly consistent, but some brands vary by a centimetre or so (especially width). That’s normal—always check the mattress specs and your bed frame’s internal measurements.

Mattress Size Comparison Table

Mattress Sizes Explained : Which One Should You Choose?

Single Mattress

The Single mattress is a popular and budget-friendly choice, especially for children’s bedrooms, guest rooms, and student accommodation. In Australia, its exact dimensions are 92 × 188 cm (36.2 × 74 inches). It is best suited for children, teenagers, and adults who sleep alone and have limited room space. While it provides adequate comfort for one person, the narrow width means there is limited space to move around during sleep. This size is ideal for everyday kids’ beds, bunk beds, trundle beds, and compact living spaces such as studio apartments or dorm rooms.

Long Single Mattress

The Long Single mattress is preferred by taller sleepers who need extra legroom without increasing bed width, making it popular in teen rooms and institutional settings. Its dimensions are 92 × 203 cm (36.2 × 79.9 inches), offering the same width as a Single but with added length. It is best for tall teenagers or adults who sleep alone and want more comfort for their legs and feet. The extra length improves sleeping comfort for people over six feet tall while still fitting into narrow rooms. This size is commonly used in teen bedrooms, guest rooms with tall visitors, hostels, and healthcare or boarding facilities

King Single Mattress

The King Single mattress is a highly popular upgrade from a Single, especially for growing teens and solo adults who want more personal space. It measures 107 × 203 cm (42.1 × 79.9 inches), providing extra width and length compared to a standard Single. It is best suited for single adults, tall sleepers, and teenagers who want long-term comfort. The added width allows for easier movement and better support for shoulders and hips, making it much more comfortable for restless sleepers. This size is ideal for young adults, compact master bedrooms, and small apartments where a Queen may not fit comfortably.

Double Mattress

The Double mattress, also known as a Full, is commonly used in guest rooms and smaller master bedrooms, though it is less popular than the Queen for couples. Its Australian dimensions are 138 × 188 cm (54.3 × 74 inches). It is suitable for single sleepers who want more space or couples who don’t mind sleeping close together. While it offers more room than a Single, it can feel cramped for two adults, especially if both move during sleep. This size works well in guest rooms, rental properties, or smaller bedrooms where space is limited but shared sleeping is still needed.

Queen Mattress

The Queen mattress is the most popular mattress size in Australia and is the standard choice for most master bedrooms. It measures 153 × 203 cm (60.2 × 79.9 inches), offering a strong balance between comfort and room efficiency. It is best for couples, single sleepers who like extra space, and parents who occasionally co-sleep with children. The size provides enough width for two adults to sleep comfortably without taking up excessive bedroom space. Queen beds are ideal for apartments, family homes, and anyone wanting a versatile size that suits most lifestyles.

King Mattress

The King mattress is preferred by couples who want significantly more personal sleeping space and less disturbance from partner movement. Its dimensions are 183 × 203 cm (72 × 79.9 inches), making it much wider than a Queen while keeping the same length. It is best for couples, larger body types, and families who often share the bed with kids or pets. The extra width allows each sleeper to move freely without affecting the other, improving overall sleep quality. King beds are commonly found in larger master bedrooms and homes focused on comfort and luxury.

Super King Mattress

The Super King mattress is a premium option designed for maximum comfort and space, though it requires a very large bedroom and specialised bedding. It measures 203 × 203 cm (79.9 × 79.9 inches), making it both wider and longer than most standard beds. It is best for couples who want maximum personal space, families who co-sleep regularly, and people who prefer an ultra-spacious sleep surface. The generous dimensions allow multiple sleepers to share without feeling crowded and greatly reduce sleep disturbance. Super King beds are ideal for luxury master suites, hotel-style bedrooms, and homes designed around comfort and spacious layouts.

How to Choose the Right Mattress Size (3-Step Method)

Step 1 – Measure Your Room and Clearances

• Sketch your room and mark doors, wardrobes and windows

• Allow 70–90 cm walking space around the bed where possible

• Check clearance for wardrobe doors and drawers

• Leave room for side tables, lamps and storage pieces

Step 2 – Consider Who Sleeps on the Mattress

Think about:

• Number of sleepers (solo, couple, family, pets)

• Height and build of each person

• Sleep position (side, back, stomach, combo)

• How much you move at night

For couples, Queen should be the minimum, with King or Super King ideal if you have the space or co-sleep with kids or pets.

Step 3 – Balance Comfort, Budget & Future Plans

• How long will you stay in this home?

• Will kids or pets end up in your bed?

• Do you host guests regularly?

• What is your budget for mattress, bed frame, protector, topper and linen?

A mattress often lasts 7–10 years, so it’s worth choosing a size that will still work for you down the track.

FAQs

What’s the most popular bed size in Australia?

The Queen mattress (153×203 cm) is the most popular in Australia. It balances space wide enough for two adults with reasonable room footprint and cost. It’s easier to fit in standard bedrooms, pairs well with most bedding and bed frames, and suits couples, small families or single sleepers wanting extra space.

Are Australian bed sizes the same as US or UK ones?

No - Australian, US and UK mattress dimensions differ. For example, an Australian Queen is 153×203 cm, while US/UK Queens may use different lengths or widths. If you buy bedding or a frame overseas, always check the centimetre measurements, not just the size label, to ensure proper fit with Australian mattress standards.

Should I choose Double, Queen, or King -how to decide?

If you live alone or share infrequently, Double or Queen may be enough. For couples, Queen is the standard minimum. If you want more personal space, have kids/pets sleeping with you, or have a large room King or Super King gives extra width and comfort. Always measure room size, leave walking space, and ensure bedding/frame fit the mattress size.

What are the standard bed sizes in Australia (in cm)?

In Australia, mattress sizes follow standard dimensions. Common sizes are: Single (92×188 cm), Long Single (92×203 cm), King Single (107×203 cm), Double (138–137×188–190 cm depending on brand), Queen (153×203 cm), King (183×203 cm), and Super King (203×203 cm). Some variations exist between manufacturers, but these are the widely accepted standard mattress sizes in Australia.

What room size works best for each mattress size?

As a guideline: Single or Long Single fits small rooms (about 2.4 × 3.0 m), Double or Queen needs a medium bedroom (≈ 3.0 × 3.2 m), King requires larger space (≈ 3.6 × 3.8 m), and Super King suits large master suites (≈ 4.0 × 4.2 m). Always leave 60–75 cm walk space around bed this gives clearance for doors, wardrobes and side tables while avoiding a cramped layout.

What mattress thickness (height) should I choose?

Mattress thickness affects support, comfort and bed height. Typical mattresses vary from 18 cm (basic foam) up to 38 cm+ (luxury or hotel-style). Lighter sleepers or single beds may do well with 22–28 cm. Heavier sleepers or those needing more spinal support should choose thicker mattresses (30–38 cm). Always match bedding and bed frame height accordingly for ease and comfort.