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So, the time has finally come. Maybe you’ve moved into a bigger place, and you finally have a bedroom that can fit a king size mattress. When you start looking for the right model, however, you see just how many different options there are.
When looking through that mess of different brands, labels, materials, and constructions, how are you to know which is the best king size mattress you can buy?
This guide should help you get a handle on this confusion. We’ll provide you with a selection of models that should be a safe choice, and alongside that, we’ve also prepared a buying guide to help clear the air a bit.
In the end, you should have all the information you need about the kind of mattress you want and what other factors you need to consider.
If you have time, check out our overall best mattress page.
11 Highest Rated King Size Beds
Zinus – Best Pressure Relief
In our opinion, the best king size mattress is the Zinus.
Memory foam mattresses are usually preferred for their superior support precisely because that helps relieve the tension in your pressure points. Back sleepers should find that their lower back feels better after resting, while side sleepers should not feel pain in their hips or shoulders.
This Zinus model provides a 3-inch top layer that is sure to reinforce your body and not flatten out. To help boost its support, it also uses a comfort layer under the top, and the base consists of two 3.5-inch high-density foam layers that should stop you from ever feeling the floorboards.
And, to help maintain its freshness, its top is infused with green tea extract. That should also prevent any bacteria or mold from developing, making it extra safe for those suffering from allergies.
Most user reviews have praised its support and fresh sleeping experience, with some pointing out some relief in their tension.
So, if you’re looking for a mattress that will support your body properly and help relieve some back pain, this one might be what you need. Its top layer is thick enough to keep you comfortable and relaxed throughout the night, and it should dramatically increase the quality of your sleep.
Nectar – Ideal for Any Position
People who sleep in different positions need different things from their mattress. Back sleepers generally prefer a firmer surface, while those that sleep on their sides need something softer to help support their hips and shoulders.
That’s why, if you change positions during the night, it could be difficult to find the right option to support you correctly. This Nectar model, however, provides just that. Its gel-cooled memory foam surface should provide enough comfort regardless of your sleeping position. Your hips and shoulders, or your lower back, all should be equally reinforced.
So, if your position shifts throughout the night and you want to ensure that your body is correctly reinforced, this mattress should have you covered. Its surface is firm enough to support your body, while still changing to your contours if your position changes.
Live and Sleep – Best Hypoallergenic
If you’re suffering from allergies, your sleeping surface should be as safe as possible to give your body enough time to heal and recover. This Live and Sleep mattress is made of memory foam, which is naturally hypoallergenic.
It is also CertiPUR-US certified, which means that it is made without harmful chemicals and that its off-gassing should be virtually non-existent. That way, you’ll know that your sleeping area is free of bacteria and mold, as well as dust mites.
Its top layer is also infused with a cooling gel, which can keep its surface fresh no matter how hot it might get. It should also provide more than enough support regardless of your sleeping position.
Most customer reviews have praised its comfort and support. However, if you’re considering this model, you should be aware that its feel is medium.
All these factors combined make this a safe choice for those that have allergies. The chemicals used in its manufacture should be minimal, and it should prevent bacteria, mold, or dust mites from making their home in your bed.
Brentwood Home – Best Motion Isolation
If you share your bed with a partner, you may find motion isolation valuable, especially if they are restless sleepers. That way, every time they turn or change position, your side of the bed should remain as calm as ever. This Brentwood Home mattress should keep the motion isolated to its original zone.
Its gel-cooled memory foam top should minimize the motion and keep it localized, while the high-density foam base should provide plenty of comfort for you both. At the same time, its cover is made of a combination of wool and bamboo, which should keep the surface fresh, wick moisture away from you, and provide a secure hypoallergenic surface.
Most owners have recognized these qualities, noting its superior support and comfort. Some have, however, remarked that it is on the firmer side, so you might consider a topper if you prefer a softer sleeping surface. Otherwise, it should be ideal for back and stomach sleepers.
This mattress could be what you need if you require something that will keep the motion to its side. Whether you want to protect your partner from your restless sleep, or you want some peace next to a restless sleeper, this one should cover most of your needs while still providing stable support for your body.
Classic Brands – Best Support
Sometimes you need a mattress that will provide even more support. This Classic Brands model boasts two levels of memory foam. The top is made of the high-quality pressure-relieving kind, beneath which is the aerated gel-cooled layer that should keep the top fresh no matter how hot the nights get.
Its base is made of high-density foam, and it should further boost its support and make sure that you never feel the floorboards. All these factors combined provide enough reinforcement regardless of your position. Its surface should, meanwhile, remain refreshing, and your sleep should be as relaxed and comfortable as it can be.
It is, however, a medium-plush feeling model. If you prefer a softer surface, this one should provide you plenty of comforts. Most owners have praised its feel while noting its fresh surface.
Those that need a mattress that can provide the extra comfort should find what they need with this one. Its two layers of memory foam should keep you propped up, and the firm base should prevent you from sinking too far and feeling anything from your frame.
Sleep Innovations – Best Temperature Regulation
While memory foam beds are known for their superior support, they have a significant shortcoming – they retain heat. That could lead to a warmer sleeping experience. That’s why this Sleep Innovations mattress has two methods to keep the excess heat down.
Its top layer is cooled with a gel, which should make its surface refreshing regardless of how hot the night gets. The airflow layer directly under it should distribute the heat throughout the mattress. That way, you shouldn’t feel trapped in your bed, and your nights shouldn’t be any hotter than they need to be.
Another thing to consider is support. If you want memory foam to reinforce your body correctly, it needs to remain cold, as it becomes softer the warmer it gets. That way, this model’s temperature regulation should also help maintain its supportive qualities, as well.
That’s why this mattress could be ideal for those that live in a warmer climate. Its surface should remain fresh, and its support should be consistent.
Sweetnight – Best Luxury
If you want the best mattress that you can buy, this Sweetnight model should be a contender. It boasts a gel-cooled memory foam top, so the surface should remain fresh and it should correctly support your body, relieving the tension to help you rest better.
Its zoned support should adapt to your body appropriately and reinforce it, while the breathable comfort layer should help maintain the airflow and help with the cooling. At the same time, its high-density base should boost the support and keep you from sinking too deep.
This mattress should provide you with a safe and fresh resting surface. Your body will be correctly supported, which will reduce the tension and make your sleep more relaxing and refreshing.
Layla Sleep – Best Flippable
The main advantage of flippable mattresses is their durability. When one side wears down, simply flip it to the other. Some, like this Layla Sleep model, provide the two surfaces with different firmness levels.
One side provides a medium-plush feeling cover, while the other gives something firmer. That way, if you’re unsure what the right firmness is for you, you can buy something like this and find out. You can also use it for your guest room, as you can never know what your guests prefer.
Both surfaces are made of a layer of copper-cooled memory foam. The plush side, however, has an additional comfort layer that the firm one lacks. Between them is the high-density foam core that provides most of the support and comfort to both surfaces.
Owners have mostly praised its dual-sided solution, remarking that it provides two different mattresses in one package. Some have also seen a reduction in back and neck pain.
Overall, this mattress should be an ideal solution for your guest room. It is a durable dual-sided product that is sure to provide more than enough support and comfort. Its soft side should be perfect for side sleepers, while its firm side should correctly support those that sleep on their backs or stomachs.
Nod by Tuft & Needle – Best Budget
Sometimes you need a mattress that won’t break your bank. In that case, you might want to avoid the cheapest options, as they will provide neither quality nor durability. Instead, you could buy something that is on the cheaper end while still having a level of quality.
This Tuft & Needle mattress comes with a top layer made of their proprietary foam. It should be fresher than memory foam while providing more responsiveness than latex. It should also isolate your motion, so your movements will stay on your side of the bed.
As it provides a balanced feel, it may not be right either for those that prefer a stiff surface or for those that want something they can sink into. If, however, you can adjust to something in the medium range, you might find this option comfortable.
Budget options no longer mean that you’re stuck with loud and uncomfortable cheap innerspring, or foam that goes flat the moment you lay on it. This mattress should provide the support and responsiveness of more expensive models, all with an approachable price.
GhostBed – Best Quality
Those that want the highest quality mattress regardless of its price should take a look at this GhostBed product. It is a latex and foam hybrid, and it should combine the advantages of both of these materials while avoiding their drawbacks.
The aerated latex top provides the bounce and responsiveness, while also avoiding heat retention. Beneath it lies the gel-cooled memory foam layer that should reinforce your pressure points, but as it isn’t in direct contact with you, it shouldn’t get too warm.
That way, you get a bouncy and responsive surface that still can support your body regardless of your sleeping position. And, at the same time, the aerated latex and cooling gel provide a refreshing sleeping surface that’s sure to keep you cool no matter how hot it gets.
Customer reviews have noted these benefits, praising its comfort, support, and fresh surface.
Overall, this mattress should provide the highest quality for your money. Its top two layers should support your body regardless of your sleeping position, and together, they should negate each other’s drawbacks. All that should make this an ideal choice for those that want something more.
Linenspa – Ideal for Kids
When you’re trying to outfit a kids’ or a guest room, you don’t know what preferences the sleeper might have. You won’t know their sleeping position, either. You’ll either have to guess or find something that can provide enough support for most people.
This Linenspa mattress provides just that. It is an innerspring and memory foam hybrid. The top layer should provide the support, while the base should provide the responsiveness and some bounce. That way, you should get the best of both worlds.
Most owners have praised its support and responsiveness. Some have, however, noted its firmness and heat retention, so if that could be a problem for you, you could find a topper. At this price range, though, it should be more than worth its price.
This is overall a well-rounded and balanced mattress that should provide enough support for most people. And, if your kids’ or guest room can’t fit a King-sized bed, it also comes in smaller sizes.
What to Look For
Buying a King-sized mattress can be difficult. As they are large, they usually cost more, and that’s why you should pay special attention to these several factors before buying one.
Preferred Firmness Level
This can be a matter of preference. If you prefer a mattress that you can sink into, you’ll usually be looking for something labeled as soft or plush. If, however, you prefer a stiffer surface, you might find something you like in the medium, medium-firm, or firm category.
Generally, a firmness preference is usually tied into your sleeping position, which we’ll get to soon.
Sleep Trial Period
When you’re buying a mattress online, you don’t have the luxury of trying it out before. By the time you know if it’s right for you, it’s already unpacked and on your bed for the past several days. That’s why some manufacturers offer a sleep trial, a window of a month or more in which you can return the product if you’re unsatisfied with it.
Some offer more time, others offer less, and a minority don’t offer sleep trial at all. Also, some may charge a fee to return it. That’s why you should know what the rules are before making a final decision.
Memory foam is usually made by exposing standard polyurethane foam to some potentially harmful chemicals. Mostly, those should air out by the time the mattress dries out, and that’s why you generally have to wait several days before you can sleep on it.
The CertiPUR certificate shows that only an acceptable level of certain chemicals were used in the manufacture, while something like Greenguard Gold will label mattresses that are safe for the elderly, children, or hospitals. In other words, those with negligible off-gassing and minimal harmful chemicals.
This is also an essential concern. It says how long the manufacturer will cover the costs of repairs on your mattress. They usually range anywhere between 1 to 10 years. Some offer more, while others offer none.
You should also pay attention to special considerations. Some manufacturers offer a limited warranty. That means, after a certain amount of time, they’ll cover the repairs only partially.
This can also be a significant factor, as it will determine many other preferences, such as firmness or materials. Some mattresses are better for side sleepers than others, and in this section, we’ll explain why that matters.
- Stomach sleepers usually prefer a firmer surface. That’s because if you sleep on something soft, you’ll sink and put additional pressure on your diaphragm, which can make breathing difficult. Getting out of bed can also be hard in that case.
- Side sleepers can be a bit difficult. You’ll usually need a softer surface to properly contour to your shoulders and hips, but it can be hard to find the right firmness level. Newer mattresses have the areas zoned according to different levels of support – softer under your shoulders, firmer under your hips.
- Back sleepers usually like a firmer surface better. If the mattress is too soft, your lower back won’t be as supported, increasing the tension there. That could lead to back pain in time. That’s why you’ll usually find a firmer model more comfortable – it will keep your back in a correct position while supporting it correctly.
Combination sleepers will generally need a mattress that all three previous categories can find comfortable. Usually, you’ll like something medium. You’ll also need to pay attention to responsiveness, as that can be vital. That’s why you also might like innerspring or hybrid models.
Material and Construction
Materials can also be a relevant factor, as they dictate how the mattress will behave when you sleep on it. Each solution has its advantages and disadvantages and depending on your preferences, you might find one or the other more comfortable.
This section will give you an overview of several most common materials mattresses are made of.
- Coils are the traditional material. They have been around for over a century, and chances are, you’ve slept on several in your life. Their most important advantage is their responsiveness, the ability to instantly adapt to your body whenever you change your position. They are also bouncier than other options, but that can be a drawback for some.
- Foams have become common in the last several decades. In the old days, foam mattresses were uncomfortable, often going flat and stiff. Nowadays, they can be supportive, and memory foam is particularly known for its reinforcing qualities. However, its chief drawback is its poor responsiveness and heat retention. The former can be remedied by using an innerspring base, while the other is usually fixed with an infusion of cooling gel.
- Latex is generally the most expensive option, particularly if it comes from natural sources. Latex options offer a responsiveness level comparable to innerspring models, but they are also supportive like memory foam, all without retaining heat. It is, however, bouncy, and some people could find a problem with that.
King Size Mattress Overview
Now that you know what you should pay attention to, this section will give you an overview of what a mattress of this size means, its benefits, as well as comparisons to other sizes.
What is a King Size Mattress?
King is among the largest mattress sizes, and it is about the same size as two Twin XL beds. That means, if you share the bed with your partner, you’ll have the same amount of space as you’d have on a Twin XL bed. Some models are offered split in half, which we’ll cover later.
It is 76 inches wide and 80 inches long, so it should provide plenty of space. Apart from your bedroom size, however, you should also pay attention to how big the door, the corridor, and the stairs are, as they can be difficult to maneuver, especially in tight spaces.
For more info, see our king mattress under $1000 guide.
Or, if you’re looking for a bargain, check out cheap king picks.
What are the Benefits?
A bed this size should offer plenty of benefits apart from its big area. It is, after all, the most popular option for those that share a bed.
– Wide Array of Choices
Most mattresses come in standard sizes, which include Twin, Twin XL, Full, Queen size, King, and California King. That means, if you notice a mattress you like, chances are high it will come in King Size, too. So, whatever your preferences are regarding material or construction, you’re sure to find what you need in this size.
Because it is as big as two Twin XL beds and meant for two, it can also have additional options that smaller models don’t have. They can have different firmness options for different sides, so if you and your partner have different preferences or sleeping positions, you’re sure to find a model that can accommodate both of you.
Also, it is a standard size, so it shouldn’t be difficult to find sheets of the right size. Most of the time, you’ll only need to consider its profile when buying bedding. If your mattress is taller, you’ll need sheets or covers that can wrap it properly.
Whatever your needs may be, chances are, you can find the right King-sized mattress that will fill them.
– For Luxury
Two people can also comfortably fit together on a Full- or Queen-sized model, so a mattress of this size can be a sign of luxury. If you get a mattress with a high enough profile, you can even approach the feeling of sleeping in a high-end hotel room.
See our full list of top luxury beds.
As it provides more space for you and your partner, you can be as close or as far as you’d like. It gives each of you the same amount of space that a Twin-sized model would. Its spaciousness is also excellent for motion isolation, so if one of you is having a restless night, the other one doesn’t have to suffer.
This is, after all, the widest option available and its central quality is the amount of space it provides. It is also spacious enough if your children or furry companions like to sleep in your bed. Everyone should have enough space on a King-sized sleeping area.
King Size vs Twin Size Mattress
As we’ve mentioned earlier, a King Size bed is as spacious as two Twin-sized. That can have its benefits, as well. You can, for example, buy two Twin-sized mattresses of different firmness if you and your partner have different sleeping preferences.
Another option is to convert a children’s room. If you have two Twin-sized beds, and your kids went to college, you could put the two beds together into a single King-sized surface. While you’ll still feel the transition between the two mattresses, you still get the space of a King Size model.
Also, you can get a topper of this size to cover the whole surface, which should mask the transition and make it more seamless. That way, your home now has an extra King-sized bed for your guests. And, if you have your children over, or you need an extra sleeping space, you can easily split the beds. That way, you have more options at your disposal.
You should keep in mind that a King-sized bed is 80 inches long, while standard Twin is only about 75. If you want the full King Size experience, you’ll need two Twin XL beds.
King vs. California King
While the two sizes cover a similar area, their main difference is in the way it’s distributed. King-sized models are 4 inches wider, but 4 inches shorter. That means, if you must choose between the two, you have to ask yourself which of these two dimensions is more significant.
If you share your bed with a partner, or you have kids or pets who like to join you, you may need a wider option, and King Size fits that bill. If, however, you are tall and usually find your feet dangling across the end of your mattress, California King might be for you (see top California king options). While it is narrower, it still provides plenty of space.
Before you decide, you should have several other considerations in mind. King Size is standard, which means that you’ll have no problem finding the right bedding for it. Your options may become more limited if you choose a California King model. Sometimes, you’ll be stuck buying sheets or covers online.
Also, as they are large mattresses, you should consider whether you can even bring them to your bedroom. Is your door big enough? Does your corridor provide enough space to turn it? How about your staircase, is it going to be a problem? These are all things you must think through before making a final decision.
What is a Split King?
A Split King is an option you get with some King Size solutions. They can be split down the middle into two Twin XL mattresses. There are many reasons why you might want this.
As it is normally made for couples, if you have different firmness or sleeping preferences, you might not agree on which model to buy. A Split King could solve that problem, as each half can provide each of you with exactly what you need. No need for compromise or sleeping on a surface that you don’t find comfortable.
It can also be useful if, for example, you have a King Size adjustable bed frame with separate controls for the two halves. One of you could raise their upper part and read, while the other could go to sleep undisturbed. Some Split King models even accommodate this – they are joined in the lower halves, but separate in the upper.
They are also easier to transport, and if your door or staircase isn’t big enough for a King-sized model, you might bring a Split King safely into your bedroom.
Split King has its downsides, as well. If you don’t like feeling the transition between the two mattresses, it might not be right for you.
Frequently Asked Questions
What Brand is Best for Back Pain Sufferers?
If you’re looking for a mattress to ease your back pain, you should be looking at something that will provide the right support. What that will be will largely depend on your sleeping position. You’ll likely need something firmer if you sleep on your back or stomach, or something softer if you sleep on your side.
Materials are more important than brands, as similarly built mattresses from different manufacturers should provide a similar sleeping experience. In the end, if you go with something from our selection, you probably can’t go wrong.
What's Recommended for Side Sleepers?
Generally, you’ll want something softer, something that will adapt to your contours and relieve the tension in your shoulders and hips. Usually, the best choice is something with a soft top and a firm base.
You could also find something that provides a different firmness feel in different zones. Usually, these types of options are softer around your shoulders and firmer around your hips. That way, all parts of your body are equally reinforced, and the tension is greatly relieved. No more hip or shoulder pain, in other words.
Are Cheap Brands Comfortable?
They can be as comfortable as more expensive options, but there are several things you should consider. Cheap brands may not be as durable, for example. They could go flat after only several months of use. They could be made using a higher amount of harmful chemicals, and the smell could linger longer than it’s safe. They could also have higher off-gassing.
Another thing they lack is a proper warranty. If you’re lucky, they’ll have limited coverage for several years. If you aren’t, you won’t get anything. That’s why, in the long run, it should be safer to buy a better quality brand mattress, as it should last much longer.
King-sized mattresses can be difficult to choose. There are so many factors to consider. Labels and relations can also be confusing. After reading our guide, you should have a handle on what they mean and what you need. You should also be able to avoid the common pitfalls that beds of this size have.
Generally, any mattress from our selection should be a safe choice. And none of them suit your needs, hopefully, we have provided you with a better understanding of what this choice entails. That way, you should be able to find the right model without too many missteps along the way.