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The Best King Size Mattresses

by Bill Welles

Once you’ve slept on a king size mattress, it’s hard to go back to anything else. This mattress size can comfortably fit two sleepers with additional room to spare for your kids or the family dog to cozy up next to you. Significantly larger than full or queen size mattresses, the king mattress offers a luxurious night’s sleep for those who have the available space in their bedroom. And if you own an adjustable bed, split king models are also available.

Because king size mattresses come standard across all brands, shoppers have a wide selection to choose from when looking for the best king size mattress. Follow along as we discuss what makes a great king size mattress, including price point, durability, pressure relief, and more.

Sealy mattress

Who is Best Suited for a King Mattress?

The king size mattress has been around since the 1940s, and before the introduction of the California king, was the largest mattress size available. A king mattress measures 76 inches wide and 80 inches long, allowing sleep partners to rest comfortably side-by-side. If you’re considering a king mattress, we recommend this size for the following groups:

Single Adults: If you can spare the floor space in your bedroom, the build of a king size mattress will make a strong statement and accent your interior design. If you’re a taller or heavier individual, a king size mattress will provide enough room to comfortably switch sleeping positions or fully sprawl out in bed. 

Couples: If you’re sharing a bed with your significant other, a king size mattress is the way to go. Sometimes cuddling isn’t conducive for a good night's sleep, so a king mattress provides ample space for each partner to sleep comfortably. And if you can’t decide on mattress firmness, a split king mattress will allow each of you to sleep with your preferred comfort levels.

Families: It can be a wonderful thing having the kids jump into bed with you, but if you’re tight on mattress space, you might not ever fall asleep. If you need extra room for the kids or your pets, a king size mattress is a great option.

Related Article: What Mattress is Best for You?

How to Choose a King Mattress

Choosing the best king size mattress is an investment that you want to benefit from for many years to come. To help you find the best mattress model, there are a few key considerations to keep in mind.

Price: King size mattresses are some of the most expensive models on the market due to their size, but you can certainly find deals to suit almost any budget. Shopping during special holiday promotions is the best time to look for a new mattress, so consider the quality construction of the mattress versus the amount you’re able to spend.

Sleeping Position: Certain sleep positions affect your weight distribution and lead to pressure points along sensitive areas. A soft king size mattress provides a spacious base for side sleepers to rest without any soreness along hips or shoulders, while back and stomach sleepers might prefer a firmer mattress to prevent sinking too far into the bed and disrupting their spinal alignment.

Quality Materials: If you want a king size mattress that you know will perform well, then pay close attention to the foam density and coil count as an indicator of quality. These items can also help you determine how long your mattress will stay intact before it starts to droop or leave indentations. In the long run, you want a mattress to withstand nightly use, alleviate pressure, and provide effective spinal support.

Pressure Relief: Speaking of, pressure relief is vital for all sleepers to rest soundly. The sweet spot often lies with a medium-firm mattress that will keep your spine even but still be soft enough to reduce pressure points. This is most important for side sleepers who experience pain where their hips and shoulders meet the mattress. To help with this, memory foam mattresses are typically recommended for relieving nightly discomfort.

Edge Support: You won’t need to hug the edge of the bed with a king size mattress, but edge support is still an important aspect of getting in and out of bed. Many hybrid mattresses have strong edges that allow for greater use of your sleep surface. High-gauge coils can reinforce the perimeter and prevent any wobbly or unstable feelings often experienced with softer mattresses.

Related Article: Best Luxury Mattresses

The Best King Size Mattresses

If you’re ready to sleep like a king, let’s take a look at a few of our favorite king size mattresses.

Best Overall King Size Mattress: Tempur-Pedic TEMPUR-Adapt Medium Mattress (10734150)

Tempur mattress

When it comes to mattresses, Tempur is one of the best in the business, regardless of the bed size. The TEMPUR-Adapt mattress combines superior cool-to-touch comfort with two layers of premium TEMPUR Material. This model continually adapts and conforms to your body’s changing needs throughout the night, relieving pressure, reducing motion, and relaxing you while you sleep for a rejuvenated tomorrow.

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Best Budget Value King Size Mattress: SleepFit Executive 1.0 Traditional Pocketed Coil Mattress (26542)

Built to the most exacting standards, the SleepFit Brand of mattresses offers a wide range of luxurious sleep options at an extraordinary value—utilizing the latest technology and materials for the best night’s sleep possible. From an independent coil support system to gel memory foam, advanced Serene Foam, and latex, there’s a SleepFit mattress to fit every body type, sleep habit, and budget. This king size model includes Tri-Zoned Wrapped Coils, Quilted Gel Foam, and Full Body Surround construction for a soothing slumber.

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Best Luxury King Size Mattress: Tempur-Pedic TEMPUR-ProAdapt Memory Foam Mattress (10737150)

Tempur mattress

We’re jumping back to Tempur-Pedic for our best luxury mattress pick, but this time it’s a mattress from the ProAdapt line. The TEMPUR-ProAdapt mattress is expertly engineered with the most pressure-relieving material and one-of-a-kind cooling technology. It adapts and conforms to your body’s unique needs with every point of contact fully supported. Motion is absorbed, pressure points are alleviated, and you will experience a deeper sleep that restores your whole body.

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Best King Size Mattress for Back Pain: Tempur-Pedic TEMPUR-LuxeAdapt Mattress (10740150)

Moving right along our list of king size memory foam matttresses, our next king size mattress brings us to the Tempur LuxeAdapt model. Maximum pressure-relieving power, superior motion cancellation, and next-level cooling technology are combined with exclusive TEMPUR Material which intuitively adapts to your unique body with ultra-conforming comfort.

The Smart Climate Cover features a super-stretch inner panel for convenience and comfort, the TEMPUR-APR+ material has an open cell structure for total relaxation, and you can rest assured with a mattress that is designed and assembled in the USA with a 10-year limited warranty.

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Best King Size Mattress for Side Sleepers: Sealy Hybrid Premium Silver Chill Plush Mattress (52335451)

Sealy mattress

If you’re a resident side sleeper, then we’ve got a king size hybrid mattress for you. A hybrid mattress from Sealy provides the perfect balance of comfort and support. This mattress combines innersprings with memory foam and the added targeted support of Posturepedic Technology. Each part of your body needs different kinds of support, and this exclusive technology targets these zones for deep support and comfort.

Features include:

  • AllergenProtect: Protects the mattress from common allergens such as dust mites and dander.
  • Sealy Immersion Advanced Memory Foam: A slower response memory foam with an open-cell structure, allows for a more breathable, comfortable sleep surface.
  • DuraFlex Coil Edge System: High-density, flexible coil border surrounds the mattress for better edge support, more usable sleeping surface, and improved durability.
  • Zoned Support: In the center zone, there are nearly 20 percent more coils for enhanced support and that "sleep-on-top" feeling you expect from innerspring.

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Pros and Cons of a King Mattress

A king size mattress is ideal for those who require lots of room to spread out in bed, but not everyone has the luxury of fitting such a hefty mattress in their bedroom. Before you jump into bed and invest in a king mattress, here are some pros and cons worth considering.


  • Leaves plenty of room for larger sleepers, those who shift around in their sleep, or those who share the bed with a sleep partner
  • King mattresses are easy to find, almost always included in the standard size offerings
  • If you have the space, a king size mattress makes for an impressive addition to a bedroom


  • Is often the most expensive mattress size, and requires purchasing a larger bed frame and bigger linens
  • Because of its size, a king mattress is quite heavy, which can make it difficult when moving or flipping your mattress
  • If bedroom space is limited, a king size mattress will take up a large portion of your floor space and might not be the most practical choice

Related Article: Best Mattress Brands

Shop King Size Mattresses at Mattress Land

Buying a new mattress is a big decision, especially if it’s a king size mattress. It's important to consider your needs, conduct your research, and choose the right mattress that provides enough space for uninterrupted sleep. If you know you’re set on a king mattress but still aren’t sure what your preferred comfort or firmness level is, don’t forget to check out our exclusive BedFIT Technology.

To find out more, you can shop Mattress Land products at any one of our 19 store locations across California, Nevada, Washington, and Idaho, or you can navigate our digital catalog and shop online.