King Mattresses

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  • Most luxurious
    Modern bedroom with a beige upholstered bed, featuring a Koala mattress and assorted pillows. Minimalist decor on grey walls and wooden side table. Modern bedroom with a light grey upholstered bed, featuring a white mattress, brown and grey cushions, and minimalist decor against grey walls. Koala Luxe Mattress Mattress infographic on dark green background detailing a seven-zone support core for head to feet; emphasises contouring to body curves.

    Koala Luxe Mattress

    4.8 (378)

    Koala Luxe Mattress

    Redefining luxury sleep, with cashmere & copper Kloudcell®.

    King, 4 Sizes
    $2,790
    $2,790
    Double
  • Most advanced
    Modern bedroom with a thick mattress on a wooden bed frame. Light grey walls, a stone side table, white lamp, and green decor accents. Modern bedroom with a thick mattress on a wooden bed frame. Light grey walls, a stone side table, white lamp, and green decor accents. Mattress with advanced ergonomic support, featuring a white and grey five-zone design for tailored body contouring. Hand pressing on a white mattress, indicating firmness level. A label shows adjustable options: firm or medium-plush feel.

    Koala Plus Mattress

    4.8 (731)

    Koala Plus Mattress

    Advanced support & cooling with seasonal and firmness adjustment.

    King, 6 Sizes
    $1,990
    $1,990
    Single
  • Most awarded
    Modern bedroom with a wooden bed frame, light green mattress, and neutral bedding. Artworks and decor on white walls, and a side table. Wooden bed frame with a mint green mattress, white pillows, and beige bedding. Minimalist decor includes framed art and a side table. Koala Mattress Mattress with essential ergonomic support features, highlighting three zones: shoulders, hips, and legs. Text on muted green background.

    Koala Mattress

    4.8 (2170)

    Koala Mattress

    Australia's top-rated mattress, enhanced support and comfort.

    King, 6 Sizes
    $1,490
    $1,490
    Single Flippable Firmness
  • Most affordable
    Modern bedroom with a wooden bed frame, grey mattress, blue and beige pillows, abstract art on the wall, and a green lamp. Modern bedroom with wooden bed frame, white and blue bedding. Abstract blue art on wall, grey floor lamp, and potted plant in the corner. Mattress with grey layers, promoting essential ergonomic support. Highlights three zones for shoulders, hips, and legs to fit body curves. Hand pressing white quilted mattress with a medium-firm feel indicator.

    Koala SE Mattress

    4.8 (538)

    Koala SE Mattress

    Cloud-like comfort at a price that will have you smiling in your sleep.

    King, 5 Sizes
    $1,190
    $1,190
    Single

Frequently Asked Questions

What are the dimensions of a king-size mattress, and will it fit in my bedroom?

A standard king mattress size is 203 cm wide by 203 cm long, providing extra space for couples or individuals who prefer enough room to stretch out. If you need to save on space, consider a queen-size bed mattress, slightly narrower but the same length. 

Before purchasing, it's essential to measure your bed frame to ensure the king mattress size fits perfectly.

Are Koala king mattresses suitable for adjustable bed frames?

Yes, Koala king bed mattresses are compatible with most adjustable bed frames, thanks to their flexible construction. Your mattress can adapt to the various positions offered by an adjustable bed base without compromising comfort or support.

How do I care for and clean my king mattress?

We recommend spot-cleaning your king-size bed mattress with a mild detergent and a damp cloth for any stains or spills. Additionally, use a mattress protector to guard against allergens and moisture, extending the life of your mattress and maintaining its hygiene.

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King Mattresses

Looking for the ultimate sleep experience? Our king-size mattress collection offers luxurious comfort and ample space for you to stretch out and relax. From king to single mattress options, we’ve got you covered.

At Koala, we've perfected the art of creating king-bed mattresses that cater to your every need, ensuring you wake up refreshed and ready to tackle the day. Whether you prefer a plush or firm feel, find the right mattress to suit your sleeping style.

Spacious comfort for undisturbed sleep

Upgrade your bedroom with a king-size mattress that gives you the freedom to move and sleep comfortably. Whether you're a restless sleeper or simply enjoy having extra room, each king bed mattress provides the perfect solution for a peaceful night's rest.

Advanced technology for superior support and pressure relief

Each king-size bed mattress features innovative Zero Disturbance® technology engineered to eliminate partner disturbance when sleeping. 

The construction of our king-size bed mattresses, which may include memory foam layers or pocket springs depending on the model, provides excellent pressure relief for your body, particularly around pressure points like shoulders and hips.

Sleep better with our health-focused mattresses

At Koala, we're proud to be a B-corporation committed to making a positive impact on the world. We stand behind our products with a 10-year world class warranty, giving you peace of mind with your purchase.

Our king-size mattresses are designed with your health and the environment in mind. We use high-quality foams free from formaldehyde, ozone depleters, and heavy metals like mercury and lead. With low VOC emissions, you can enjoy better indoor air quality while you sleep. Plus, our anti-bacterial treatment ensures a hygienic sleeping surface.

We understand that a better lifestyle starts with a good night's sleep. Our innovative mattress designs minimise partner disturbance so you can rest easy. Plus, with fast delivery on mattresses and bed frames, you can start enjoying your new king-size mattress in no time.

Experience the Koala difference today

Ready to transform your sleep? Explore our king size mattress collection and find the perfect fit for your needs. With CertiPUR-US® certification and an anti-slip bottom, our king-size mattresses offer both quality and stability. Our innovative Kloudcell® technology with multiple support zones provides a plush yet supportive feel for unparalleled comfort.

Don't settle for anything less than the best. Choose Koala for your king-size mattress in Australia and experience the difference for yourself.