King Size Mattresses

Investing in a king-size mattress means giving yourself the luxury of plenty of space to sleep. Find out more about these fantastic mattresses with our frequently asked questions!

A king mattress measures 5' x 6'6" or 150cm x 200cm, which is also why you might hear them referred to as a 5ft mattress in the UK. So, whether you're a couple who wants extra space at night or just a solo sleeper wanting to sleep like royalty, it's guaranteed to do the job and fit your king-size bed like a dream. Not sure if this is the right size for you? Check out our mattress size guide for more information.

We offer a range of 5ft mattresses to suit any sleeping position or support needs, including:

King-size memory foam mattresses

If you want the ultimate support, a king-size memory foam mattress is the perfect choice. Memory foam uses your body heat to mould your contours for sleep, customising it to your needs! Find out more about these innovative mattresses in our memory foam buying guide.

King-size pocket sprung mattresses

A king-size pocket-sprung mattress is excellent for couples. It consists of thousands of individually wrapped pocket springs that operate independently. This means that even if you or your partner move around often at night, any movement will be isolated to prevent jostling!

King-size open coil spring mattresses

Also called a traditional mattress or Bonnell coil, a king-size open coil mattress has a structure comprising a series of interconnecting springs. This spreads the weight evenly across the surface, giving you high support at an affordable price!

King-size latex foam mattresses

Latex foam works similarly to memory foam in that it uses your body heat to mould to your body, but it has the additional benefit of being hypoallergenic. Our king-size latex foam mattresses are perfect for those with allergies, as latex foam is naturally hypoallergenic!

King-size orthopaedic mattresses

If you suffer from a bad back or stiff and achy joints, you might consider investing in a king-size orthopaedic mattress. These mattresses are designed to be firmer than other mattresses, helping to promote healthy spinal alignment and alleviate aches and pains.

Our 5ft mattresses come in the following firmness ratings:

• Soft king-size mattresses
• Soft/medium king-size mattresses
• Medium king-size mattresses
• Medium/firm king-size mattresses
• Firm king-size mattresses

The firmness rating is essential for how restful your sleep is and, in turn, how healthy your day is. Choosing the wrong firmness can lead to aches, pains, and sleep loss!

Deciding on the right firmness can be impacted by personal preference, long-lasting injuries, weight, and sleeping position! A firm memory foam king-size mattress, for example, would be better suited to those looking for something firmer, such as those with back problems or heavier people. Find out more about mattress firmness in our mattress buying guide.

All mattresses will need to be replaced eventually, and we recommend buying a new king mattress every 6 to 8 years. Some signs to look out for that it needs replacing are:

• It's starting to sag in some areas
• You're starting to feel aches and pains after sleep
• The springs are beginning to poke through

If your 5ft mattress shows these signs, it might be time to replace it! Our guide on how often you should change your mattress goes in-depth on this subject, but you can help to increase its lifespan by keeping a regular maintenance schedule. Rotate your mattress every few weeks; if necessary, flip it and clean it regularly. Explore plenty of handy mattress cleaning tips in our guide to help you keep your mattress in the best condition.

Despite their large size, our king-sized mattresses cover a wide price range to suit any budget. So, whether you're looking for a low-priced king-size mattress or want to go all out on a fancy king hybrid mattress, we have something for every sleeper. Whatever price point you're looking for, we have affordable finance options, including Klarna and PayPal!

Get the most comfortable sleep every night with a king-sized mattress from Happy Beds, and also enjoy the following benefits:

• Manufacturer's guarantee – all of our king mattresses come with a 5-year guarantee, covering you for any manufacturing issues that might occur.
• Fast delivery - there's no need to wait around, as we have mattresses in stock and ready to be delivered whenever you need them with our standard and premium delivery service.
• Finance options - our extensive payment options, from upfront payments to spreading the cost with Klarna and PayPal, make paying for your order easier.
• Customer service – we have a team of knowledgeable customer service professionals who can answer any questions you might have about your order via email, phone, or live chat.
• Rated Excellent – buy confidently from Happy Beds, knowing that we have over 15,000 reviews from previous customers, giving us an Excellent rating from Trustpilot.