Sized for the king — Australia's largest standard bed. A king mattress protector safeguards the biggest, most generous mattress in the house, guarding against spills, sweat and allergens while washing far more easily than the mattress itself. Waterproof and breathable, in a fitted-skirt design that stays put, with a bamboo-blend option for softer, cooler sleep. Part of our wider mattress protectors range, family-owned, priced direct and held in stock locally.
Waterproof bamboo mattress protector with breathable hypoallergenic cover
Australian-made waterproof mattress protector with soft terry cotton top
The King Protector — for the Biggest Bed in the House
The king is Australia's largest standard bed, and the mattress that gives couples the most room to sleep without touching. A king mattress protector keeps that generous mattress clean and dry across its whole footprint — every night of shared sleep, every spilled coffee, every sick day. It takes the wear so the mattress stays fresh and warranty-intact, and washes far more easily than a king-sized mattress ever could.
Why It's Worth It
Protects a premium mattress
A king mattress is a serious investment. A protector is the cheapest insurance you can put on it — and it helps keep the warranty valid, since stains void many.
Healthier sleep for two
Two sleepers across a wide footprint means more moisture and allergens. A barrier against dust mites and sweat keeps the whole surface cleaner for both of you.
Covers the full footprint
The king's extra width is exactly where a fitted protector earns its keep — full, even coverage edge to edge, with a skirt that holds it secure all night.
Cooler with bamboo
The bamboo-blend option adds a breathable, moisture-wicking surface — softer and cooler for two people sharing a large bed through warm Queensland nights.
King Size & Fit
An Australian king mattress measures 183 × 203 cm — sometimes called the Eastern King. Note it's 10 cm narrower than the US king (193 cm), so a protector bought from an overseas retailer may not fit correctly. Our king size mattress protectors are made to the Australian standard, with a fitted skirt that stretches over the mattress like a deep fitted sheet and holds secure all night. Size to the AU king specifically — a queen protector won't reach across the width.
Need a Different Size?
Shop the matching protector for every bed in the house:
Caring for Your Protector
That's the whole point — a protector is far easier to wash than a mattress, and on a king that difference is significant. Most are machine-washable; follow the care label and avoid high heat on the waterproof backing, which can degrade it over time. Wash every couple of weeks, or straight away after a spill, and both the protector and the king mattress under it will stay in good shape for years.
Why Buy Your King Protector at A2Z
A protector is a small purchase that protects a much larger one, and buying it with the mattress means a guaranteed size match — important at king size, where Eastern-King and US-king dimensions are easy to confuse. As a Queensland family business since 2013 we keep king protectors in stock and priced direct, across five South-East Queensland showrooms in Brisbane (Rocklea), Ipswich, Bundall, Sandgate and Beenleigh, open seven days. Free local delivery is available within roughly 10 km of our Rocklea warehouse, with paid delivery across Brisbane, the Gold Coast, Sunshine Coast, Ipswich, Logan and Toowoomba, and flexible payment through Afterpay, Zip, Humm and Latitude.
King Mattress Protector FAQs
What size is a king mattress protector?
It's made to fit a standard Australian king mattress — 183 × 203 cm, sometimes called the Eastern King — with a fitted skirt that stretches over the mattress like a deep fitted sheet. Note this is 10 cm narrower than the US king.
Will a US king protector fit an Australian king?
Not always — the Australian (Eastern) king is 183 cm wide, while the US king is 193 cm, so a protector bought from an overseas retailer may sit loose or not fit properly. Size to the Australian king for a secure fit.
Will a queen protector fit a king?
No — a queen (153 × 203 cm) is 30 cm narrower than a king, so it won't reach across the width. Size to the king specifically. If you have a queen, see our queen protectors instead.
Are your king protectors waterproof?
Yes — they're fully waterproof, guarding against spills, sweat and accidents while staying breathable. There's also a bamboo-blend version with the same waterproofing and a softer, cooler top surface — ideal on a large bed two people share.
Can I machine-wash a king mattress protector?
Most are machine-washable — follow the care label and avoid high heat on the waterproof backing, which can shorten its life. Washing every couple of weeks, or right after a spill, keeps it performing.
Can I buy king protectors in-store?
Yes — visit any of our five Queensland showrooms in Rocklea, North Ipswich, Beenleigh, Sandgate or Bundall, open seven days. Find addresses and hours on our contact page.
Complete the King Bed
Round out the master bed: add a supportive pillow, browse the full bedding range, or start from the bottom with the right king mattress and king bed frame.
Browse the king mattress protectors above, shop other sizes from single to super king, or see all mattress protectors.