Choose the right mattress in Australia by matching the bed size to your room, lying in your normal sleep position for at least 15 minutes, and confirming the base, trial, and warranty terms before you pay.
The choice comes down to a few decisions — size, feel, support, base, and return terms — and most buyers get one backwards. Work through them in order.
How To Pick The Right Bed Size First
Buy the largest bed your bedroom can hold without crowding it. Most couples wish for a bigger bed; almost nobody wishes for a smaller one. Measure before you shop, leaving room to walk around the bed and open wardrobe doors.
- Length: at least 10–15 cm longer than the tallest sleeper, or knees dangle off the edge for years.
- Room fit: tape the footprint on the floor to see it at full size.
- Partners: if you share the bed, a queen is the practical floor; larger sizes reduce movement transfer through distance.
Test It The Way You Actually Sleep
Fifteen minutes in your usual sleep position beats thirty minutes sitting on the edge. Lie down the way you sleep at home and stay long enough for the novelty to wear off. If you co-sleep, bring your partner and move around — rolling over reveals whether the mattress isolates motion.
Check for:
- Spinal alignment — close to its natural curve, not sagging or arching.
- Even weight distribution, so no spot takes all the pressure.
- Pressure points at shoulders and hips, where a too-firm bed announces itself.
Firmness and support differ: a soft mattress can support well, a hard one can leave your lower back unsupported. Judge support by how your body sits, not how the surface feels under your hand.
Base, Materials And Motion Transfer
Test the mattress on the same base you will use at home. A mattress that feels right on a showroom ensemble can feel completely different on timber slats — and some makers void warranty coverage on an unsupportive base.
For shared beds, ask about zoned firmness: a firmer middle supports the heaviest part of the body while softer zones under shoulders and hips cut disturbance when one person rolls over.
On materials, certifications matter more than the word “natural.” Check that breathable or organic claims are backed by recognised chemical-safety certification, and that foam and adhesive emissions meet safety standards. “Breathable” is a marketing term; a certification is a tested claim.
| What To Check | What Good Looks Like |
|---|---|
| Length | At least 10–15 cm longer than the tallest sleeper |
| Size vs room | Largest bed the room fits with walking space left over |
| In-store test | 15+ minutes in your normal sleep position |
| Base match | Tested on the same base type you own — slats or ensemble |
| Support | Spine near its natural curve, pressure off shoulders and hips |
| Shared bed | Zoned firmness, low motion transfer |
| Trial and return | Change-of-mind period and return process compared in writing |
| Warranty | Indentation cover beyond 20 mm, the normal-use threshold |
Trial Periods, Warranties And What To Avoid
Compare trial and return terms before price — a cheap mattress you cannot return is the expensive option. Read who pays return freight and what condition the mattress must be in.
An indentation under 20 mm after extended use is considered normal across the industry and is usually not a valid warranty claim; visible dipping beyond that is the cue to talk to the retailer.
The costliest mistakes:
- Buying without lying down in your normal sleep position.
- Testing for two minutes, then deciding.
- Ignoring room dimensions and buying a bed that overwhelms the space.
- Never checking which base the mattress will sit on.
- Judging on softness alone and skipping support, alignment, and pressure relief.
Frequently Asked Questions
How long should I test a mattress before buying?
At least 15 minutes lying in your normal sleep position, not sitting on the edge. Brief tests tell you almost nothing about how a bed behaves overnight. If you share the bed, bring your partner and move around to check motion transfer.
How much longer than the sleeper should a mattress be?
At least 10–15 cm longer than the tallest person using it. Anything less means years of feet hanging off the end or your head against the headboard. Measure the tallest sleeper before you shop.
Is a slightly dipped mattress still under warranty?
Usually not. An indentation under 20 mm after extended use is treated as normal settling rather than a defect. Visible dipping beyond that threshold is when a claim is worth raising with the retailer.
When you are ready to shortlist, our tested roundup of the best mattresses in Australia compares the current options side by side.
For the official guidance behind the sizing, testing, and certification advice above, see CHOICE’s mattress buying guide.
References & Sources
- CHOICE. “How to choose the right mattress.” Source for sizing, testing duration, base compatibility, and warranty guidance.
- CHOICE. “Mattresses | Reviews, Expert Tips & Guides.” Hub page covering mattress reviews and material safety considerations.
- Bedbuyer. “Buying a New Bed – A Complete Buyer’s Guide.” Source for bed sizing, in-store testing, and motion transfer guidance.
