King Mattresses

Our king mattress range features some of the best quality king size mattress models on the market. Shop from a huge range of options knowing that they all adhere to standard king mattress dimensions. It’s important to find the best king size bed mattress that’s perfect for you, but also fits into your bedroom. Experience the sleep of your dreams - buy now.

Mattress Quiz What mattress to buy? Take our Mattress Quiz to analyse your body type, feel and preference to find the best mattress for you. Here at OMF, we help you to buy your dream mattress.
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Revivify Support Mattress

Original Mattress Factory Australia

From$498

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Urban Support
Sale
Urban Support

Original Mattress Factory Australia

$1,550 $3,298

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Cloud7 Firm
Sale
Cloud7 Firm

Original Mattress Factory Australia

$1,749 $3,498

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Rejuvenate 2.0

Original Mattress Factory Australia

From$598

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Refresh Mattress Medium
Sale
Refresh Mattress Medium

Original Mattress Factory Australia

$1,304 $2,288

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BC7 Plush
Sale
BC7 Plush

Original Mattress Factory Australia

$849 $1,698

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Saint Barth
Sale
Saint Barth

Original Mattress Factory Australia

$2,529 $4,598

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Byron Plush
Sale
Byron Plush

Original Mattress Factory Australia

$1,418 $2,488

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Recovery 7 Medium Mattress
Sale
Recovery 7 Medium Mattress

Original Mattress Factory Australia

$1,221 $2,598

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Urban Plush
Sale
Urban Plush

Original Mattress Factory Australia

$1,550 $3,298

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Saint Kitts
Sale
Saint Kitts

Original Mattress Factory Australia

$2,529 $4,598

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Atlantic Plush
Sale
Atlantic Plush

Original Mattress Factory Australia

$1,298 $1,698

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Pure Plush Mattress
Sale
Pure Plush Mattress

Original Mattress Factory Australia

$1,550 $3,298

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Back Supporter Mattress
Sale
Back Supporter Mattress

Original Mattress Factory Australia

$1,554 $2,988

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Recovery 7 Support Mattress
Sale
Recovery 7 Support Mattress

Original Mattress Factory Australia

$1,221 $2,598

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Elegance Soft
Sale
Elegance Soft

Original Mattress Factory Australia

$1,599 $3,198

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Keppel Mattress
Sale
Keppel Mattress

Original Mattress Factory Australia

$2,859 $5,198

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Hamilton Mattress
Sale
Hamilton Mattress

Original Mattress Factory Australia

$2,859 $5,198

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Noosa Medium Mattress
Sale
Noosa Medium Mattress

Original Mattress Factory Australia

$1,565 $2,698

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Elegance Firm
Sale
Elegance Firm

Original Mattress Factory Australia

$1,599 $3,198

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Hayman 2200 Medium
Sale
Hayman 2200 Medium

Original Mattress Factory Australia

$2,799 $5,598

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Brighton Support
Sale
Brighton Support

Original Mattress Factory Australia

$2,649 $4,998

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Newport Plush
Sale
Newport Plush

Original Mattress Factory Australia

$2,649 $4,998

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Byron Support
Sale
Byron Support

Original Mattress Factory Australia

$1,418 $2,488

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King Size Bed Mattress

Welcome to our king mattress collection, where we offer a terrific range of mattresses across all feels, types and price points.

A king bed mattress is nothing short of a dream! With so much space, this mattress allows plenty of room for both sleepers to really stretch out and enjoy every square inch. A king-size mattress calls for a generously sized room. You would ideally need a space of at least 3.5M2 (which also allows for bedroom furniture).

What size is a king mattress?

Customers regularly ask us how big is a king-size mattress? The answer is 1830mm x 2030mm.

Is a king size bigger than a double bed mattress?

Absolutely - it is significantly bigger than a double mattress. A double mattress is only 1370mm x 1880mm. In fact, nothing is larger than a king mattress size other than a super king mattress.

Are king mattresses different sizes?

No - here at OMF all our mattresses are standardised, so you can expect these dimensions of 1370mm x 1880mm no matter which model you select. Don’t confuse this with a super king mattress or king single mattress!

What are the different types of materials used to make king-size mattresses?

You have plenty of options when it comes to the choice of king mattress materials! These include:

How to buy a king-size mattress online

Simply use our filters to refine your search. You can browse by price, features, feels and types to land on the perfect king-size bed mattress for you.

What is the cost of a king-size mattress?

Given its size, an entry-level king-size mattress starts at incredibly reasonable prices, all of which are openly displayed on our product listings. The price increases in line with the quality of materials, number of features and duration. You can use our search filters to refine results by price point if this is helpful.

Contact us about the best king-size mattress for you

If you’re keen to buy a king-size mattress but have more questions, just reach out to us! We’d be delighted to hear from you and help however we can.