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Finding The Best King Size Mattress In 2021

Last Updated: 08 July 2021

We sleep one-third of our entire lifetime. What can be a better reason than this to invest in the best king size mattress that you can afford? We invest so much in a variety of products around the house but often overlook our mattresses. From the economic point of view, an extra $100 spent on a better mattress will give you good returns especially because it is something that you are going to use every single day of the year!
Doctors recommend that you buy the best bed you can afford so that you have enough room to stretch yourself. There is evidence that our spines compress by working all day and it is important that when we sleep, there is room enough for you to lie flat and let it relax.

For the numerous times that we toss and turn in the night, it is but right that we have enough room overall so that you do not get on your partner’s nerves; well quite literally.

You deserve a great night’s sleep. Here is an impressive list of the ten best king size mattresses that we could think of in 2021.

Home Maker Guide created for informational purposes only. Thus, we neither endorse you in any way to buy specific products in our reviews, nor making you act like it’s written in our guides. We are reserving the rights for you to make your personal decision.



Editor-in-Chief of the Home Maker Guide
best king size mattres

TOP 10 Best King Size Mattress: Comparison Chart

Best King Size Mattress In A Box — Linenspa 10 Inch Hybrid Mattress Review

Linenspa 10 Inch Hybrid Mattress
  • Made of 53% Polyester Fiber | 39% Rayon Fiber | 6% Polyurethane Foam | 2% Polypropylene Fiber
  • Product dimensions – 80” L x 76” W x 10” H | Feel – Medium-Firm | Weight – 70 lbs.
  • Built with a durable innerspring base and a memory foam pillow top, this hybrid mattress is easily the best bang for your buck
  • Available in a medium firm 8 inch profile, a medium 10 inch profile, or a plush 12 inch profile that also features gel infusions and individually encased coils
  • Any new product will expand within minutes and can have a mild scent upon unboxing that will dissipate in a few hours in a well-ventilated room | Remove packaging within 72 hours, and allow an extra 48-72 hours for proper decompression

Product with High King Size Mattress Ratings — Olee Sleep Gel Infused Memory Foam Mattress Review

Olee Sleep Gel Infused Memory Foam Mattress
  • Your purchase includes One Olee Sleep Aquarius 10-Inch Memory Foam Mattress in Blue, King Size
  • Mattress dimensions – 80" W x 76" L x 10"H | Feel – Medium-Firm
  • Fits all frames – Steel, wood or platform bed frames, box springs and floor | 93% polyester / 7% spandex
  • Unique Gel-infused Foam Layer – to regulate temperature | High Density Base Layer – For a longer-lasting and durable mattress
  • Any new product will expand within minutes and can have a mild scent upon unboxing that will dissipate in a few hours in a well-ventilated room | Remove packaging within 72 hours, and allow an extra 48-72 hours for proper decompression

Luxury King Size Mattress — Classic Brands Gel Memory Foam Mattress Review

Classic Brands Gel Memory Foam Mattress
  • 76" W x 80" L x 14" H
  • Premium pressure-relieving memory foam and high-density aerated cool gel memory foam are combined together to provide the essential support and comfort for a deeper night's sleep
  • Beautifully tailored and detailed with a stretch knit fabric cover with waterfall edge and matching knit side panels
  • Gel infused ventilated memory foam creates a plush and comfortable sleeping surface for a more restful night's sleep; high-density base foam relieves pressure points and conforms to your body, and provides unparalleled support during the night
  • High-quality memory foam conforms to your body while the cool gel regulates body temperature; porous, open cell design allows for a greater circulation and meets CertiPUR-US program standards for performance, emissions, and durability

Best King Size Mattress Under 1000 — TUFT & NEEDLE King Mattress Review

TUFT & NEEDLE King Mattress
  • Proven: Over a million people choose us every night. In fact, 95% of our customers keep and love their T&N Original Mattress, Featuring our own proprietary T&N Adaptive foam, the Original Mattress is universally comfortable for all sleeping positions
  • Proprietary foam: Our T&N Adaptive foam is engineered based on customer feedback and provides pressure relief where you need it most. An open-cell structure provides a flexible sleep surface that adjusts to you as you move throughout the night
  • Cool sleeping: Our foam is more advanced than outdated materials such as latex and memory foam, the T&N Adaptive foam helps pull away heat with cooling graphite and gel beads, wrapped in our breathable plush cover to help keep you cool and comfortable
  • Free of harmful chemicals: Our mattresses Greenguard Gold and CertiPUR-US certified, this means our beds are held to the highest of standards and are third party tested and certified to free of harmful chemicals, substances or materials
  • Questions: We pride ourselves on customer service and urge you to reach out to us directly if you have any questions at any point, our expert customer service team will be available to help you through any hesitations, problems or questions you may have

Best California King Mattress — Signature Design by Ashley Hybrid Innerspring Mattress Review

Signature Design by Ashley Hybrid Innerspring Mattress
  • HYBRID MATTRESS: For supportive, dreamy sleeping. This mattress brings it home with layers of padding atop individually power packed innerspring coils with 2 perimeter rows for a better night's rest
  • 12" PROFILE: Mattress is designed with gel memory foam, upholstery grade comfort support foam, and 360 individual power packed wrapped coils for maximum lumbar support. Quilt foam gives you that soft, cozy comfort you crave
  • PLUSH SUPPORT: Includes a .75" high density gel memory foam, 1" upholstery grade support foam and 1.5" soft quilt foam for extra lumbar support
  • KING SIZE: Measures 76" W x 79.5" D x 12" H and is compatible with most king bed frames. Bed foundation, box spring and frame available, sold separately
  • READY FOR INSTANT ENJOYMENT: Arrives in a box. Simply unbox, cut the protective wrap, unroll and watch the mattress expand.

Extra Firm King Size Mattress — Signature Design by Ashley Memory Foam Mattress Review

Signature Design by Ashley Memory Foam Mattress
  • MEMORY FOAM MATTRESS: For sound sleep you've always dreamed of. This body contouring memory foam mattress delivers amazing support, pressure relief and comfort
  • 12" PROFILE: Designed with layers of memory foam for support and pressure relief, all with a comfortable feel. The support foam core reduces motion transfer for peaceful, undisturbed sleep
  • PLUSH SUPPORT: Thick layers of memory foam contour to your body and deliver amazing support, pressure relief and comfort for all types of sleepers
  • KING SIZE: Measures 71" W x 79" D x 12" H and is compatible with most king bed frames. Bed foundation, box spring and frame available, sold separately
  • READY FOR INSTANT ENJOYMENT: Arrives in a box. Simply unbox, cut the protective wrap, unroll and watch the mattress expand.

Luxury King Size Mattress — Zinus 12-inch Memory Foam Mattress Review

Zinus 12-inch Memory Foam Mattress
  • THE RIGHT COMBINATION - Our special recipe for rejuvenating rest. Refreshing green tea and moisture-absorbing Activ charcoal infused into a pressure-relieving memory foam that cradles your shape so you awake free of aches and pains and fresh as a daisy
  • PRESSURE - RELIEVING FOAMS - 3 inches conforming memory foam, 2 inches soft, airflow enhancing comfort foam, and 7 inches durable, high density base support foam; ideal for side sleepers and petite to average weight sleepers
  • CERTIPUR US CERTIFIED - Highest quality foam is Certipur US Certified for durability, performance, and content
  • EXPERTLY PACKAGED - Our technology allows this mattress to be efficiently compressed into one box that’s easily shipped and maneuvered into the bedroom; Simply unbox, unroll and this mattress do the rest, expanding to its original shape within 72 hours
  • Worry-free 10 year limited warranty included; Twin mattress supports a maximum weight of 250 pounds, while all other sizes can support up to 500 pounds

Best Selling Medium Firm Mattress — LUCID Medium Firm Gel Memory Foam Mattress Review

LUCID Medium Firm Gel Memory Foam Mattress
  • This dual-layer mattress combines 2.5 inch gel infused, ventilated memory foam surface + 7.5 inch high density foam base for a MEDIUM-FIRM feel
  • Gel infused memory foam regulates temperature while conforming to the body to ease pressure points
  • Temperature-regulating, moisture-controlling TENCEL blend fabric cover creates a comfortable air layer
  • Memory Foam is Hypoallergenic and CertiPUR-US certified for safety and performance
  • Compressed, rolled, and shipped in a box for simple setup; easily fits through narrow hallways and staircases

Top Selling Hard King Size Mattress — Olee Sleep Hybrid Gel Infused Memory Foam Mattress Review

Olee Sleep Hybrid Gel Infused Memory Foam Mattress
  • Composed of 5 layers includes pocket spring
  • Memory foam adapt to your body shape and temperature
  • Gel infused memory foam regulates temperature while conforming to the body to ease pressure points
  • To ensure that this mattress lasts many years, its coils are protected by multi HD and memory foam layers which add to unparalleled quality and incredible comfort.
  • 10 year limited Manufacture warranty

The Best of Super King Size Mattresses — Vibe Quilted Hybrid Mattress Review

Vibe Quilted Hybrid Mattress
  • 76" W x 80" L x 12" H
  • Gorgeous sapphire blue euro pillow top
  • Beautifully detailed stretch knit quilted cover optimizes conforming properties
  • Individually wrapped innerspring coils provide orthopedic support and prevent motion disturbance
  • Meets CertiPUR-US program standards for performance, emissions, and durability

Buyer’s Guide: All You Need to Know About The Best King Size Mattress

Is There A Difference Between King And California King Mattress?

The California king size mattress is only 72 inches in width. However, what it loses in width, it gains in its length. It is 84 inches in length, making it one of the best things to have happened to taller folks.

How Long Is A Mattress Good For

How Long Is A Mattress Good For

The average lifetime of the mattress is roughly five to seven years. You could stretch your king size mattress’s life to approximately ten years.

Latex, hybrid, and memory foam mattress may last you up to ten years with prudent care and maintenance. We strongly recommend you change your air, water bed, pillow-top, futon mattress, and innerspring mattress every 5-7 years.

How To Choose The Best King Size Mattress



The most comfortable king size mattress is one that allows you to get up refreshed every morning. Comfort is closely related to the kind of material used for making the mattress. Begin by doing intensive research before you hit on a physical store or click on the Buy button. Also, if you think that your bed is not comfortable enough you can choose the best mattress pads to improve it.


Support is a quintessential feature of a good king size mattress. Are you a side sleeper or do you lie down flat on your back? The answer will determine what type of mattress you must go in for. If you are a side sleeper, you must go in for plush memory foam and if you lie flat on your back will require a firm medium latex or hybrid mattress. You shouldn’t forget about the best mattress topper for back pain if have some problems with it.


  • Innerspring coils: Most affordable, they can last for years. They are layered with either foam or latex. They have metal coils and that is why they retain shape.
  • The latex layer is one of the layers in the innerspring mattress.
  • Memory foam is usually the topmost in the top-rated king size mattress.
  • A hybrid mattress is a mixture of latex and memory foam. They turn out to be super soft king size mattresses.
  • Pillow top is an extra layer that is either placed on the mattress or stitched on top of the mattress. A king size pillow top mattress is good for reducing body aches.


Buying a king-size mattress set is no mean investment. It means that you are spending a chunk of your savings. Use it to buy the best that you can buy. Most mattresses will come with a minimum of 5 to 10 years warranty.


Buying a king size mattress is a big investment. You must consider the warranty period on the mattress. Most companies will give bigger warranties with the option to buy an extended warranty since they know that their mattress quality is superior.

Special Features

Manufacturers are spoiling the customers for choice. There are so many special features when it comes to the best king size mattress 2021 that you are going to be exhausted choosing the correct one for yourself.

Some of the special features include:

Special Features
  • Patented furnishing fabric
  • Airflow technology that controls heat
  • Skin-friendly fabric and furnishing
  • Hypoallergenic materials
  • Odor busting technology or zero off-gassing
  • Hybrids in a different configuration of material
  • Specially formulated mattress to address issues such as body pains and uninterrupted sleep cycle
  • Orthopedic king size mattress


Be ready to shell out anywhere between $800 and $2000 for a good quality eastern king mattress or the best California king mattress. It is important to note that the price of the mattress is not necessarily the yardstick to know the quality.

Best King Size Mattress Types

Memory Foam

Best King Size Mattress Types

King size memory foam mattress is a great addition to your home furnishing if you are looking for comfort as well as support. They are the best choice for side sleepers because they offer a very good shoulder and hip support. It gradually contours your body and lets you feel plush. It is very popular amongst eastern king mattress buyers because it contains several layers of foam.


A gel king mattress is slightly different from the memory foam one. If you are buying it for the first time, we would recommend that you physically test it to see if the feeling is good for you before you sign on the dotted lines. It is a get that is added to the foam mattress in its upholstery layer. The gel allows the body heat to dissipate more effectively than memory foam.

Pillow Top

Pillow Top

A pillowtop king size mattress is good for side sleepers. It is an additional layer of upholstery that is sometimes simply placed but, most of the time, stitched to the main innerspring or coir mattress. The best pillow top mattress is soft and cushiony. It also helps in keeping the back aligned and the hip and shoulders in comfortable alignment.


Air mattresses use an air chamber, and that is the primary support. The other layers are foam and/fiber upholstery. The air chamber is adjustable on the whole, and also each of the sides can be adjusted differently for couples who have different firmness preferences. They are beneficial for back sleepers.


Latex uses layers of natural foam, unlike artificial foam that is used in memory mattresses. The latex mattress is a firm king size mattress. It supports the sides, back, and tummy sleepers. The natural foam is less dense than an artificial one, and that is why it stays cooler.

Best King Size Mattress FAQ

How Big Is A King Size Mattress?

A king-size bed mattress ideally measures 76 inches in width and is 80 inches in length.

How To Move A King Size Mattress?

Moving a mattress to another room or to another location itself can be a challenging job, and if you are doing it all by yourself or with friendly help, there is a chance that you can put a lot of pressure on your arms, knees, and back.

  1. Remove all the loose-fitting sheets, quilts, and blankets from the mattress
  2. You could let the mattress cover and the fitted sheet me if they do not come in the way
  3. Lift the mattress from the frame of the bed or the boxspring
  4. Use a cling wrap or a mattress cover to cover the mattress from dirt and grime
  5. Zip the wrap
  6. Clear the path that you need to travel out with the mattress. Make sure that you communicate clearly with your friend on how to move it out.

Do I Need A Topper For King Size Mattress?

It is a good idea to add a topper to your king-size foam mattress. A mattress topper that is made from latex or memory foam is the most desirable as it adds a nice layer of cushioning on the king size mattress. A good quality mattress topper can even give a facelift to a cheap king size mattress.

Do Two Twins Make A King Size Mattress?

When you join two twin mattresses, you will get a king size mattress that is two inches wider and five inches shorter than the standard king size bed.

What Is The Best Mattress Brand?

If you were to ask us, we’d point blank tell you that it is LinenSpa. It features three different sizes and the plushest at 12 inches. It has gel infusions in individually encased coils that dissipate heat.

Do You Need A Boxspring With A Memory Foam Mattress?

If you are using a memory foam mattress on a metal bed frame, you will need to equip it with a boxspring in the first place. A metal bed frame is capable of distributing the weight of the mattress and subsequently, your weight evenly on it only if it is equipped with it.

Is Bed Frame Important?

A bed frame is an important aspect of getting the best out of your mattress. A bed frame provides firm external support so that you can derive the best benefit out of your investment in mattress.

Verdict and Our Recommendation For 2021

As always, our recommendation goes to the Linenspa 10 Inch Hybrid Mattress. It has the goodness of both traditional innerspring support as well as modern memory foam plushness. The 12 inches mattress also features gel infusions done within individually encased coils. The mattress is shipped in a neat box packaging. The mattress may have some brown colored flecks that are known as carbons, but they will not leave any mark on the mattress. The mattress comes with an amazing ten-year limited warranty. No need to flip the mattress every time too!

Those were the best king size mattress to be reckoned with. Hope you liked our intense guide on the best king size mattress 2021. Queries and clarification can be sent to homemakerguide, and we will clear them with our greatest pleasure.


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How We Tested
In a bid to bring to you the best of the best king size mattress, only we have studied hundreds of them! We took king size mattress reviews from store customers as well as online shoppers and began consolidating them into a big database. The resulting winner was obvious and predictable, but what we uncovered apart from that amused us as well as stunned us. We wanted this to be your go-to guide whenever you were looking for the industry best affordable king size mattress.
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