The Australian king bed mattress size is 183 × 203 cm. In simple terms, a king mattress is 183 cm wide and 203 cm long, making it 30 cm wider than a queen mattress while keeping the same length. When people search “king bed mattress size”, they’re usually comparing dimensions to ensure the mattress fits their room, linen and bed frame.
Here’s why this matters: the king mattress size gives couples extra comfort, reduces partner disturbance and delivers that luxurious, hotel-inspired feel many Australians want in their primary bedroom.
Knowing the exact mattress size helps Australians:
Buy the right king bed frame or bed base
Choose correctly sized king sheets, doona covers and protectors
Ensure the bed fits comfortably within their bedroom layout
Determine whether to upgrade from a queen
Avoid costly returns or incorrect purchases
In simple terms: the king size is big, beautiful and a lifestyle upgrade — but only if you measure properly.
To put the king mattress size into perspective:
| Mattress Size | Width (cm) | Length (cm) |
|---|---|---|
| Single | 92 | 188 |
| King Single | 107 | 203 |
| Double | 138 | 188 |
| Queen | 153 | 203 |
| King | 183 | 203 |
| Super King | 203 | 203 |
A king mattress gives couples significantly more personal space — the biggest reason people upgrade.
Once Australians know the king bed mattress size is 183 × 203 cm, they often compare mattress types. Here are the main categories:
The most popular type in Australia.
Individual springs minimise motion transfer
Great for couples
Offers strong edge support
Perfect for pressure relief.
Conforms to the sleeper’s body
Reduces pressure points
Ideal for side sleepers
A premium combination of foam + pocket springs.
Best of both worlds
Strong support with plush comfort
Great temperature regulation
Durable and naturally breathable.
Hypoallergenic
Long-lasting
Excellent support for back sleepers
Designed for alignment.
Firm or medium-firm feel
Supports spinal posture
Popular with those who experience back pain
Hotel-inspired comfort.
Extra cushioning
Plush sleep surface
Works beautifully with upholstered king beds
Here’s the practical buyer’s guide Australians rely on:
A comfortable room for a king mattress should ideally measure at least 3.5 × 3.5 m.
Side sleepers: memory foam or hybrid
Back sleepers: latex or firmer hybrid
Stomach sleepers: supportive medium-firm designs
Couples benefit most from:
Pocket spring
Hybrid
Memory foam
These reduce disturbance from partner movement.
General recommendations:
Firm: back sleepers
Medium: most people
Plush: side sleepers
Standard king mattresses range from 20–40 cm thick.
Your choice affects:
Sheet depth
Bed aesthetics
Overall comfort
If you sleep hot:
Choose cooling memory foam
Hybrid with breathable layers
Latex for natural ventilation
Your bed frame or base must match the king mattress width exactly.
Avoid spacing issues that can cause mattress movement.
Extra width = less disturbance and uninterrupted sleep.
A king mattress improves comfort, especially when paired with king pillows and layered bedding.
The king width instantly gives a master bedroom that luxury-suite feel.
A length of 203 cm offers plenty of space to stretch.
The mattress anchors large rooms, preventing them from looking empty.
Family-friendly and comfortable for weekend mornings.
House of Isabella Australia is a trusted destination for king beds and bedroom furniture because it offers:
Fast delivery Australia-wide
Buy Now, Pay Later with Afterpay & Zip
East & West Coast warehouses for strong stock availability
Large in-stock king bed and bedroom furniture catalogue
Exclusive furniture pieces you won’t find elsewhere
Australian-based customer care team
While browsing king bedroom pieces, many customers also look at design influences from:
Café Lighting & Living
Florabelle Collection
Gallery Home
Zaffero
Emac & Lawton
OneWorld Collection
These designer names help shoppers understand styling direction, materials and craftsmanship influences. They are included solely for context, not endorsement.
House of Isabella curates pieces that pair beautifully with the 183 × 203 cm mattress size — including upholstered king frames, timber king beds, storage bases and oversized headboards.
Australians love the balance of comfort and support.
Perfect for high ceilings and minimal interiors.
Vertical panelling, wingback designs and extended width frames.
Natural tones, curved edges and fluted details.
Soft neutrals: stone, mushroom, oat and warm white.
Bouclé and linen treatments remain top trends.
More Australians choose ergonomic or orthopaedic mattress technology.
To create a high-end look:
King fitted sheet
King flat sheet
King doona cover
2 × king pillows
2 × European pillows
Decorative cushions + lumbar
For a king mattress, ideal headboard widths are:
Equal to the bed (183 cm)
Or oversized (200–240 cm) for a luxury feel
Best rug sizes for king setups:
240 × 340 cm
300 × 400 cm
Try:
Slimline pendants
Wall sconces (often influenced by brands like Zaffero or Café Lighting & Living)
Tall lamps for height balance
Ideal width: 45–60 cm
This balances the generous king mattress width.
Large beds work best with uncluttered styling.
Use tonal layering:
Stone
Beige
Soft grey
Warm neutrals
This complements the scale of a king mattress.
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Mentions of brands such as Florabelle, Gallery Home, Café Lighting & Living, Zaffero, Emac & Lawton and others are included purely for descriptive and contextual purposes. House of Isabella Australia is not affiliated with, endorsed by, or associated with these brands.
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