According to ABS Building Activity data reported by the Housing Industry Association, the average floor area of new detached homes in Australian capital cities fell from 256mĀ² in 2019 to 246mĀ² in 2024. Bedrooms are getting smaller, which makes choosing the right mattress size more important than ever. The right size for each room comes down to a few key factors, and they are different depending on how that room will actually be used.
Work out the floor space before you look at sizes
A mattress that looks fine in a showroom can make a bedroom feel cramped once the wardrobe, bedside tables, and door swing are factored in. Before you look at any size, measure your floor space.
Allow at least 90cm of clearance along the sides you walk, and check that doors and built-ins can open without obstruction. Amart stocks mattresses across every standard Australian size, so once you have your measurements, matching them to the right fit is straightforward.
Choosing between a queen and king in the master bedroom
A queen mattress is 153cm wide, while a king is 183cm. That 30cm gap matters a lot in a room under 4m wide, where a king can leave awkward, unusable space on either side of the bed. Measure before you commit.
For couples sharing the room, the size decision also involves how each person sleeps. A king gives each person roughly 91cm of space, comparable to a single bed each. In a room that fits it, that extra width makes a practical difference night to night.
Sizing a spare bedroom that does two jobs
Spare bedrooms in new homes are often asked to serve as both a guest room and a home office. That means you’ll need to weigh up guest comfort against the floor space a desk or wardrobe will take up. A double mattress at 138cm wide keeps guests comfortable. A single at 92cm wide frees up noticeably more room for furniture.
For most spare bedrooms under 3m wide, a single is the more practical call. It leaves enough room for a desk and a wardrobe without the room feeling like a corridor.
Why kids mattresses should be bought a size up
The default choice for a young child’s room is a single, but a king single is usually the better long-term decision. At 107cm wide versus 92cm, the size difference rarely changes the room’s layout. But kids grow quickly, and a king single gives you several more years before you need an upgrade.
Pairing a king single mattress with a bed ensemble takes the compatibility guesswork out of it. The base and mattress are designed to work together, and when the time comes to replace the mattress, you won’t need to replace the base at the same time.
Getting the size right from the start
The mattress is the anchor point of any bedroom. Get the size right first, and the furniture layout, clearances, and room function sort themselves out from there.
As one of Australia’s largest furniture retailers, Amart carries a mattress range that spans every standard Australian size, from single through to super king, so every bedroom in your new home is covered.
