Choosing the right bed size is one of the most important long-term decisions you’ll make for your sleep. Buy too small, and you’ll wake up cramped; too large, and it won’t fit your room. This guide covers every Australian bed and mattress size, from baby cots to super kings, so you can make a well-informed choice.
Note: All measurements below are for the Australian market. Bed sizes differ between countries, so always confirm dimensions when buying internationally.
Australian Mattress Sizes Chart
Australian men average 175.6 cm tall and women 161.8 cm. Always allow at least 10–15 cm of extra length beyond your height when selecting a mattress.
| Bed Size | Width (cm) | Length (cm) | Imperial |
|---|---|---|---|
| Super King | 203 | 203 | 6ft 8in × 6ft 8in |
| King | 183 | 203 | 6ft × 6ft 8in |
| Queen | 153 | 203 | 5ft × 6ft 8in |
| Double | 138 | 188 | 4ft 6in × 6ft 2in |
| King Single | 107 | 203 | 3ft 6in × 6ft 8in |
| Long Single | 92 | 203 | 3ft × 6ft 8in |
| Single | 92 | 188 | 3ft × 6ft 2in |
| Baby Cot | 69 | 130 | 2ft 3in × 4ft 3in |
Detailed Australian Bed Size Dimensions
Super King Bed: 203 cm × 203 cm
The super king is the largest mattress available in Australia, offering the most luxurious sleeping space. At 203 × 203 cm, it’s a perfect square, giving both sleepers maximum room to spread out. Ideal if you share with a restless partner, have children or pets who join you in the morning, or simply want the ultimate sleeping experience.
- Best for: 2 adults needing extra breathing space, plus pets or children
- Recommended room size: At least 4m × 4m (approx. 12ft × 12ft)
- Total mattress area: 4.12 m²
King Bed: 183 cm × 203 cm
The king is the largest standard Australian mattress. While 20 cm narrower than a super king, it still offers generous space for two adults. A great choice if you want maximum comfort without needing an enormous room.
- Best for: 2 adults who need breathing space, or one active sleeper wanting extra room
- Recommended room size: At least 4m × 4m
- Total mattress area: 3.71 m²
King vs. Queen
A king is 30 cm wider and the same length as a queen. If you and your partner both need space to move during the night, a king is worth the investment. If you’re working with a smaller bedroom, a queen is still very comfortable for two adults.
Queen Bed: 153 cm × 203 cm
The queen is the most popular bed size in Australia, and for good reason. It’s the sweet spot between space and practicality for couples in average-sized bedrooms. A single sleeper has a luxurious 153 cm to themselves; two people get a comfortable 76.5 cm each.
- Best for: Couples needing some breathing space, or 1 active single sleeper
- Recommended room size: At least 3m × 3.5m (approx. 10ft × 12ft)
- Total mattress area: 3.10 m²
Queen vs. Double
A queen is 15 cm wider and 15 cm longer than a double. If you need extra legroom or are taller than average, the queen is the better choice. Doubles are great for saving space in smaller rooms.
Double Bed: 138 cm × 188 cm
Also known as a full-size bed, the double is a versatile hybrid between a single and a queen. It comfortably fits one adult and can accommodate two adults with less personal space. At 46 cm wider than a single, it’s a popular upgrade for teenagers and young adults. Double mattresses are generally the most affordable of the larger sizes.
- Best for: One adult looking for comfort at a reasonable price; teenagers upgrading from a single
- Recommended room size: At least 3m × 3m
- Total mattress area: 2.59 m²
King Single Bed: 107 cm × 203 cm
The king single is wider and longer than a standard single, making it a great choice for taller individuals who want more sleeping room without the cost of a double. Two king singles pushed together create a super king, useful for couples with different firmness preferences. Always check that your bed frame is compatible, as standard single frames won’t work.
- Best for: Taller individuals, active sleepers, teenagers
- Recommended room size: 2.7m × 3m
- Total mattress area: 2.17 m²
Long Single Bed: 92 cm × 203 cm
The long single has the same width as a standard single but is 15 cm longer, ideal for taller sleepers who don’t need extra width. A great option for guest rooms or single adults who are tall but prefer a narrower sleeping surface.
- Best for: Tall sleepers who don’t move much
- Recommended room size: 2.7m × 3m
- Total mattress area: 1.86 m²
Single (Twin) Bed: 92 cm × 188 cm
The single, also called a twin, is the smallest adult mattress in Australia. Perfect for children, teenagers, college dorm rooms, bunk beds, and small bedrooms. It’s the most budget-friendly option and works well for anyone with limited space.
- Best for: Older children, teens, and college students
- Recommended room size: 2.5m × 2.7m
- Total mattress area: 1.72 m²
Baby Cot: 69 cm × 130 cm
Baby cot mattresses are designed specifically for infants and toddlers aged 1–3 years. Standard cot dimensions are 69 × 130 cm. Many baby cots can be converted to toddler beds, saving money as your child grows. A cot mattress can fit into any size bedroom.
Questions to Ask Before Buying a Bed in Australia
- How many people will be sharing the bed? Do you have pets that sleep with you?
- What is the age and height of the primary sleeper(s)?
- Do you prefer extra width or extra length?
- What size is your existing bed frame? Will the new mattress fit?
- Do you prefer a firm or soft mattress feel?
- How large is your bedroom? Will the bed leave enough space to move around?
- What is your budget? (Larger beds cost more, both to buy and to buy linen for.)
Conclusion
Understanding Australian bed size dimensions makes choosing the right mattress much simpler. Whether you’re upgrading from a single to a double, or investing in a super king for the ultimate sleep experience, matching your mattress size to your room, budget, and sleeping habits is the key to a great night’s rest.
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