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King Size Mattresses

King size mattresses offer complete comfort. Forget sleeping like sardines; you and your other half will never argue about bed hogging with this 5’ x 6’6” mattress. A king-size mattress is perfect if you have a large bedroom. Why choose any other than a king mattress if you’ve got the space to play with? You’ll sleep better at night and be free to toss and turn without disturbing your partner’s sleep.

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SleepSoul Comfort 800 Pocket Spring Mattress
Medium
4.7 star review
4.7
(3)
SleepSoul Comfort 800 Pocket Spring Mattress
From£264.99 You Save: £80 Now From £184.99 You Save: £80
5 Year Guarantee
Fusion Lite Memory and Recon Foam Orthopaedic Mattress
Medium
4.7 star review
4.7
(15)
Fusion Lite Memory and Recon Foam Orthopaedic Mattress
From£214.99 You Save: £55 Now From £159.99 You Save: £55
10% Off CODE: EXTRA10
Cashmere 3000 Pocket Sprung Memory Foam Mattress
Medium
4.9 star review
4.9
(115)
Cashmere 3000 Pocket Sprung Memory Foam Mattress
From£344.99 You Save: £100 Now From £244.99 You Save: £100
10% Off CODE: EXTRA10
Supreme Ortho Spring Reflex Foam Orthopaedic Extra Firm Mattress
Firm
4.8 star review
4.8
(303)
Supreme Ortho Spring Reflex Foam Orthopaedic Extra Firm Mattress
From£224.99 You Save: £60 Now From £164.99 You Save: £60
10% Off CODE: EXTRA10
1
Soft-Medium
4.7 star review
4.7
(59)
Mirage Spring Quilted Bamboo Fabric Natural Fillings Mattress
From£229.99 You Save: £60 Now From £169.99 You Save: £60
10% Off CODE: EXTRA10
1
Medium-Firm
5 star review
5
(46)
Tennyson 4000 Twin Pocket Sprung Orthopaedic Natural Fillings Mattress
From£604.99 You Save: £165 Now From £439.99 You Save: £165
10% Off CODE: EXTRA10
1
Medium-Firm
4.8 star review
4.8
(79)
Signature Silver 1400 Pocket Sprung Orthopaedic Natural Mattress
From£319.99 You Save: £95 Now From £224.99 You Save: £95
10% Off CODE: EXTRA10
1
Medium
4.8 star review
4.8
(33)
Windsor 3000 Pocket Sprung Orthopaedic Pillow Top Mattress
From£694.99 You Save: £230 Now From £464.99 You Save: £230
10% Off CODE: EXTRA10
Neptune Spring Quilted Damask Fabric Mattress
Soft-Medium
4.9 star review
4.9
(163)
Neptune Spring Quilted Damask Fabric Mattress
From£189.99 You Save: £45 Now From £144.99 You Save: £45
10% Off CODE: EXTRA10
Signature Platinum 2000 Pocket Sprung Orthopaedic Natural Mattress
Medium-Firm
4.9 star review
4.9
(164)
Signature Platinum 2000 Pocket Sprung Orthopaedic Natural Mattress
From£349.99 You Save: £100 Now From £249.99 You Save: £100
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1
Soft
4.6 star review
4.6
(62)
Premier Spring Quilted Fabric Mattress
From£164.99 You Save: £40 Now From £124.99 You Save: £40
10% Off CODE: EXTRA10
Signature 2000 Pocket Sprung Pillow Top Natural Fillings Mattress
Medium-Firm
4.8 star review
4.8
(158)
Signature 2000 Pocket Sprung Pillow Top Natural Fillings Mattress
From£414.99 You Save: £125 Now From £289.99 You Save: £125
10% Off CODE: EXTRA10
Membound Memory Foam Spring Mattress
Soft
4.6 star review
4.6
(118)
Membound Memory Foam Spring Mattress
From£209.99 You Save: £60 Now From £149.99 You Save: £60
10% Off CODE: EXTRA10
1
Medium-Firm
4.7 star review
4.7
(92)
Signature Gold 1800 Pocket Sprung Orthopaedic Natural Mattress
From£314.99 You Save: £95 Now From £219.99 You Save: £95
10% Off CODE: EXTRA10
Majestic 1000 Pocket Sprung Orthopaedic Mattress
Medium-Firm
4.8 star review
4.8
(238)
Majestic 1000 Pocket Sprung Orthopaedic Mattress
From£254.99 You Save: £70 Now From £184.99 You Save: £70
10% Off CODE: EXTRA10
1
Medium-Firm
4.8 star review
4.8
(23)
Ambassador 3000 Pocket Sprung Orthopaedic Natural Fillings Mattress
From£544.99 You Save: £160 Now From £384.99 You Save: £160
10% Off CODE: EXTRA10
1
Medium-Firm
4.8 star review
4.8
(81)
Bamboo Vitality 2000 Pocket Sprung Memory and Reflex Foam Mattress
From£404.99 You Save: £130 Now From £274.99 You Save: £130
10% Off CODE: EXTRA10
1
Medium
4.9 star review
4.9
(63)
Aloe Vera 1500 Pocket Sprung Memory and Reflex Foam Mattress
From£344.99 You Save: £100 Now From £244.99 You Save: £100
10% Off CODE: EXTRA10
Maestro Spring Memory Foam Tufted Mattress
Soft-Medium
4.7 star review
4.7
(141)
Maestro Spring Memory Foam Tufted Mattress
From£249.99 You Save: £70 Now From £179.99 You Save: £70
10% Off CODE: EXTRA10
Ortho Royale Spring Orthopaedic Mattress
Medium
4.8 star review
4.8
(338)
Ortho Royale Spring Orthopaedic Mattress
From£209.99 You Save: £60 Now From £149.99 You Save: £60
10% Off CODE: EXTRA10
1
Soft-Medium
4.7 star review
4.7
(47)
Eclipse Pocket Sprung 800 Quilted Fabric Mattress
From£229.99 You Save: £60 Now From £169.99 You Save: £60
10% Off CODE: EXTRA10
1
Medium
4.5 star review
4.5
(83)
Gold Tufted Orthopaedic Spring Mattress
From£169.99 You Save: £40 Now From £129.99 You Save: £40
10% Off CODE: EXTRA10
1
Medium
4.9 star review
4.9
(27)
Clifton Royale 1000 Pocket Sprung Orthopaedic Mattress
From£264.99 You Save: £80 Now From £184.99 You Save: £80
10% Off CODE: EXTRA10
Pinerest Spring Semi-Orthopaedic Quilted Fabric Mattress
Soft-Medium
4.8 star review
4.8
(116)
Pinerest Spring Semi-Orthopaedic Quilted Fabric Mattress
From£164.99 You Save: £45 Now From £119.99 You Save: £45
Festive Daily Deal

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Sleep like royalty on a king size mattress

While the king size mattress may not be the biggest mattress on the market, with that honour belonging to super king mattresses, they will surely delight those who love extra room while they sleep. Our king size mattresses are expertly crafted to ensure you stay comfortable all night. Say goodbye to restless nights - with a king size mattress in your room; you'll surely get the best sleep of your life. Find the king size mattress that best suits your needs with Happy Beds.

Explore king mattresses available in a variety of materials

Finding the perfect king size mattress for your body and sleep style can be challenging. Luckily, we offer various types of mattresses so that you can find the one that best fits you. Looking for something that will mould to your body's contours? Try a king size memory foam mattress. Or, if you prefer a mattress made with all-natural materials, try a natural filling king size mattress filled with materials such as cotton and wool. No matter what you are looking for in a mattress, we will surely have an option that suits you perfectly.

What size is a king size mattress?

A king size mattress measures 5ft x 6.6ft, or 150cm x 200cm. So, whether you're a couple who wants extra space at night or just a solo sleeper wanting to sleep like royalty, a king mattress is guaranteed to do the job. Not sure if a king mattress is the right size for you? Check out our mattress size guide for more information.

What types of king size mattresses are available?

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

King size memory foam mattresses

If you're looking for the ultimate support, then a king size memory foam mattress is the perfect choice. Memory foam uses your body heat to mould your contours for sleep, which is customised to your needs!

King size pocket sprung mattresses

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

King size open coil spring mattresses

Also called 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 suffering from allergies, as latex foam is naturally hypoallergenic!

King size orthopaedic mattresses

If you suffer from a bad back or have 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 a healthy spinal alignment to alleviate aches and pains.

What firmness levels do king size mattresses come in?

Our king size 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 of your mattress is incredibly important when it comes to 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 mattress firmness can be impacted by personal preference, any long-lasting injuries, weight, and sleeping position!

Find out more about mattress firmness in our mattress buying guide.