King Single Mattresses

A king single mattress in Australia measures 107cm wide by 203cm long — longer than a single, narrower than a double. We hold king single mattresses in stock across our Sydney, Melbourne and Brisbane warehouses, with prices from $200 foam to $1,200 hybrid pocket springs. If you want a king single mattress in a box under $500 with Afterpay, you'll find it below.

Quick Buyer's Checklist

• Size confirmation — King single is 107cm × 203cm. Longer than a standard single, narrower than a double.
• Mattress type — Foam, memory foam, pillow top, latex or hybrid. Each suits a different sleeper.
• Firmness — Match to your sleep position (soft for side, firm for stomach).
• 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 — Our king single mattresses include a 12-month warranty on manufacturing defects.

What size is a king single mattress in Australia?

A king single mattress in Australia is 107cm wide and 203cm long. Standard thickness ranges from 20cm for foam to 35cm for pillow top hybrids. The 203cm length matches a queen and king bed — great for tall teens and adults over 180cm.

What types of king single mattresses are available?

King single mattresses split into five main types: foam, memory foam, pillow top, latex, and hybrid pocket springs.

King single foam mattress

Foam mattresses cost $200-$400 and last 6-8 years. Lightweight, good for guest rooms and growing kids.

King single memory foam mattress

Memory foam contours to body shape, easing pressure points. Best for side sleepers. $300-$700.

King single pillow top mattress

Soft top layer over firmer support. Plush feel without sacrificing back support. $400-$900.

King single latex mattress

Naturally cooler, durable for 10-15 years. Higher cost ($600-$1,200) but lasts longer than foam.

King single mattress in a box

Vacuum-rolled for easy delivery. Takes 24-72 hours to fully expand once unboxed.

How do I choose the right firmness?

Match firmness to your sleep position. Side sleepers need plush or medium-soft to cushion shoulders and hips. Back sleepers need medium support to keep the spine aligned. Stomach sleepers need firm to stop the hips sinking.

What Most Furniture Sites Won't Admit

Almost every king single mattress sold online in Australia is imported from China, Vietnam or Malaysia — including ours. The real difference is what happens after the container lands. Marketplaces dropship from overseas. 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. Always read the warranty conditions before you buy.

King Single Mattress FAQ

Will a king single mattress fit on a standard single bed frame?

No. A king single is 15cm wider and 15cm longer than a standard single. You'll need a king single bed frame with internal dimensions of 107cm × 203cm.

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 fully decompress. Sleeping early may dent the mattress and void the warranty.

Can I pay with Afterpay or Zip?

Yes. A $400 king single mattress works out to four payments of $100 with Afterpay over 8 weeks, or about $35 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 30 days. Once the vacuum seal is broken, returns aren't possible for hygiene reasons.

Complete Your Bedroom

A king single mattress works best with the right bed frame, headboard and bedside table.

• King Single Bed Frames — Metal, wooden, storage and ensemble in 107cm × 203cm.
• Headboards & Bed Heads — Upholstered, timber and panelled styles.
• Bedside Tables — 2 and 3 drawer options.