Field guide · 2026
Mattress sizes in Australia explained, single to king
Mattress sizes in Australia come in five common types: single, king single, double, queen and king. A queen is about 153 cm wide and 203 cm long, and a king is about 183 cm wide and the same length. Sizes vary by a few centimetres between brands, so check the exact figures before you pay.
The standard sizes in centimetres
Retailers list sizes as width by length. These figures come from the published size guides of Australian bed sellers, and they match closely.
- Single: about 92 x 188 cm
- King single: about 107 x 203 cm
- Double: about 138 x 188 cm
- Queen: about 153 x 203 cm
- King: about 183 x 203 cm
Two larger or longer sizes also exist. A super king is about 203 x 203 cm. A long single is about 92 x 203 cm, which is a single with the extra length of a king single. Many brands sell only the five common sizes.
Why the numbers differ between sellers
You will see small gaps from page to page. One size guide lists a single as 92 x 190 cm and a double as 137 x 190 cm. IKEA lists its standard single as 92 x 189 cm and its double as 135 x 189 cm. Bedshed notes that its measurements are indicative, because a tolerance of 20 mm is normal in manufacturing.
IKEA also says there is no international standard for mattress sizes. That is why a queen in Australia is not the same as a queen in the United States. IKEA lists its standard queen as 152 x 202 cm and its king as 180 x 200 cm, so an Australian king is a little bigger than that. Always use the centimetre figures on the product page, not just the size name.
Which size suits who
A single suits children and smaller adults who sleep alone. A king single is longer, so it suits teenagers and tall solo sleepers. A double gives one person more room, or a couple a snug fit. A queen is the usual pick for couples. A king gives about 30 cm more width than a queen, and Bedshed says it is roughly the same as two long singles side by side.
That last point helps when you move house. Some king bases are sold as two long single pieces, which are easier to carry through narrow halls and stairs.
How to measure your bed frame
If you are keeping your frame, measure it before you order. Measure the inside space where the mattress sits, from rail to rail for width and from head to foot for length. Do not measure the outside of the frame, because the rails and legs add extra width.
Match the base to the mattress size exactly. Bedworld warns that a mismatch can cause sagging and may void a warranty. If your frame is old or from overseas, compare its inside size with the centimetre figures above. An Australian size can differ from a frame made for another country.
How to measure your room and the way in
Measure the floor space first. Bedworld suggests leaving at least 60 cm of clear space at the sides and foot of the bed. It gives rough room sizes: about 3.1 m x 3.3 m for a queen, at least 4 m x 4 m for a king, and about 4.5 m x 5 m for a super king. Treat these as a guide, not a rule.
Then measure the path the mattress must travel. Check the front door, hallways, corners, lifts and stairs. A king is a large mattress, and the Bedshed guide notes that a king base can come as two long single pieces, which are easier to move.
Write down your numbers, then compare them with the product page. If a seller gives a size to the millimetre, use that figure, and allow for the small variation noted above.
A short buying checklist
- Pick the size name, then confirm the width and length in centimetres.
- Measure your frame's inside space and your room, with 60 cm to spare.
- Measure doors, halls and stairs.
- Check that the base matches the mattress.
- Check the return and delivery terms before you order online.
Our own limit: the editors read what sellers publish. We have not measured the mattresses ourselves.