King Mattress

A king mattress in Australia measures 183cm wide by 203cm long — the largest standard mattress for couples wanting space. We hold king mattresses in stock across our Sydney, Melbourne and Brisbane warehouses, with prices from $400 foam to $2,200 hybrid pocket springs. If you want a king mattress in a box under $800 with Afterpay, you'll find it below.

Quick Buyer's Checklist

• Size confirmation — King is 183cm x 203cm. Matches a king bed frame internal dimensions.
• Mattress type — Foam, memory foam, pillow top, latex, hybrid pocket spring or innerspring.
• Firmness — Match to sleep position (soft for side, firm for stomach, medium for back).
• Bed frame fit — Slat spacing must be 7cm or less. Wider voids most warranties.
• Delivery format — Mattress in a box (vacuum-rolled, 24-72hr expansion) or flat-pack.
• Trial period — 12-month warranty on manufacturing defects.

What size is a king mattress in Australia?

A king mattress in Australia is 183cm wide and 203cm long. Standard thickness ranges from 20cm for foam to 35cm for pillow top hybrids. The 183cm width is 30cm wider than a queen, giving each sleeper 91cm of space.

What types of king mattresses are available?

King foam mattress

Foam mattresses cost $400-$700 and last 6-8 years. Lightweight, good for guest rooms.

King memory foam mattress

Memory foam contours to body shape, easing pressure points. Best for side sleepers. $500-$1,000.

King pillow top mattress

Soft top layer over firmer support. Plush feel. $700-$1,500.

King latex mattress

Naturally cooler, durable for 10-15 years. Higher cost ($900-$1,800) but lasts longer than foam.

King hybrid pocket spring mattress

Pocket springs with foam comfort layers. Best edge support and motion isolation. $800-$2,200.

King vs Queen mattress — which should I buy?

A king mattress (183cm wide) gives each sleeper 91cm of space — 15cm more per person than a queen. Choose a king if you share with kids or pets, or sleep restlessly. Choose a queen if your bedroom is under 3.5m wide.

What Most Furniture Sites Won't Admit

Almost every king mattress sold online in Australia is imported from China, Vietnam or Malaysia — including ours. We import in bulk, hold stock in our Australian warehouses, and ship from there.

Second truth: most "10-year warranties" exclude what actually fails. Body impressions under 3cm, edge support loss and cover wear typically are NOT covered.

King Mattress FAQ

Will a king mattress fit a king bed frame?

Yes, if both are standard Australian king size (183cm x 203cm). Check internal dimensions on the product page.

How long should I wait before sleeping on a mattress-in-a-box?

Wait 24-72 hours for full expansion. Most reach 90% within 4 hours but need extra time to decompress.

Can I pay with Afterpay or Zip?

Yes. An $800 king mattress works out to four payments of $200 with Afterpay over 8 weeks, or about $70 per month with Zip. We also accept Klarna and PayPal Pay in 4.

Can I return a mattress if I don't like it?

Returns are accepted on unopened mattresses within 15 days. Once the vacuum seal is broken, returns aren't possible for hygiene reasons.

Complete Your Bedroom

• King Bed Frames — Metal, wooden, storage in 183cm x 203cm.
• Headboards and Bed Heads — King-size upholstered, timber, panelled.
• Bedside Tables — Matching drawer designs.

Why us

Simple Deals — family-run since 2018. Australian warehouse stock. Support on 1300 456 786. Afterpay, Zip, Klarna and PayPal. 12-month warranty, 15-day returns. 4.66★ from 5,363 reviews.