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best king mattress reviews and rated under 500 and 100

Best King Size Mattress (Top Rated List)

Our picks for the top rated king size mattresses that you can buy right now.

In this review, we discuss our selections for the best rated king size mattresses that you can purchase online right now. We have a number of picks that range from memory foam mattresses to hybrid beds. Keep reading for more details.

The Best King Size Mattresses Online

Ah, the king size mattress. A clear indication that you’re either an adult in a relationship or you’re tall. Regardless, you’re obviously looking to step up (or replace) your mattress game. Well, we’re here to help. Here’s our list of the top rated king size mattresses on the market.

What’s a list without any context, though? Keep reading for more details about what you should look for in a new mattress. Hopefully, with the help of this buyer guide, you’ll be able to upgrade your bedroom.

leesa hybrid mattress review deal

Firmer Option

15% Off


Sapira is the premium hybrid mattress from Leesa, one of the largest and most popular online mattress brands. If you're looking for a firm king size mattress, Leesa Sapira Hybrid is a great place to start.
winkbed review coupon

Best For Heavier People

$300 Off

Code: SLEEP300

WinkBed is built to a higher standard than most beds. It has two layers of coils for extra support and a plush quilted cover that makes this bed feel like a luxurious hotel mattress. WinkBed is one of the best rated king size mattresses anywhere, in-store or online.
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Custom Mattress

$100 Off + Gift

Code: NY100

Helix is an interesting company in that, through their Sleep Quiz, they help align you with a mattress that's right for you. Helix might not be truly custom, but it's as close as you'll get for under $1,500.


  • Mattresses Reviewed150+

    Mattresses Reviewed

  • Brands 60+


  • Made the List 4

    the List

  • Number of Contributors 6

    Number of Contributors

What Is The Best King Size Mattress?

How do you know when it’s time to get yourself a king size mattress? Here are a few indicators:

  • You keep falling out of bed because your mattress is exactly 16” too narrow.
  • You can’t find your tiny queen size bed in your giant bedroom.
  • You and your partner want to share a bed, but you don’t want to cuddle or touch at all.

Jokes aside, if you have the space in your room, a king size bed is a great option for tall folks who need extra sleeping area. For example, our resident tall guy, JD at 6’5”, sleeps diagonally on a king mattress.

We also suggest a king size mattress for people with wider builds. It’s easy to feel cramped on a full size or a queen, especially if you’re sharing the bed. Lastly, a king bed is also really nice for couples because, as much as you love your partner, sometimes you really do just need your space to sleep well.

Leesa Sapira Hybrid


  • Back, stomach, and combo sleepers (or anyone that wants a medium-firm mattress)
  • Hot sleepers (the mattress does a great job with temperature regulation)
  • Those who want a neutral-foam bed that's highly supportive
  • People that want a firm king size mattress

Sapira is the hybrid version of the Leesa mattress, and, therefore, it not only costs more, but also is more supportive. In fact, for individuals weighing over 250 lb, we definitely recommend Sapira over Leesa. It still has a neutral, comfortable feel, but it mixes in pocketed coils for added durability.

leesa sapira mattress review cover
Sapira looks like a luxury mattress.

While there are cheaper mattresses out there, Sapira made the list because it’s a safe pick, especially if you sleep on your back or stomach at night. In terms of firmness, Sapira comes in at about a medium to medium-firm, although softness/firmness is a subjective element and will differ from person to person.

leesa sapira mattress review firmness and feel

The heavier you are, the softer a bed will feel—and, in the case of Sapira, the closer the bed will feel to being a medium on the soft/firm scale. Regardless, it responds quickly to pressure and has zero of that stuck-in-the-mud feeling.



  • Those who want a hotel luxury bed without the crazy price tag
  • Petite, medium, and heavy individuals (WinkBed is an extra supportive bed)
  • All sleep styles (back, side, stomach, combo)
  • If you want a bed that's rated extremely highly throughout the Internet

WinkBed belongs in the home of royalty or some rich celebrity—that’s how nice it looks and feels. This is a 14.5″ thick bed that incorporates two layers of coils, proprietary foams, and a plant-based tencel cover. It might not be our favorite bed to move (it’s heavy), but it’s one of our favorites overall.

winkbed mattress review main image wink bed cover of bed
WinkBed is a hefty mattress that checks a lot of boxes.

Regardless of which firmness level you select (they offer three), WinkBed has a neutral, pillow-top feel (i.e. no memory foam). It’s a bit like Nest Alexander, but more airy. It’s fluffy and comfortable, yet almost unmatched in terms of support.

WinkBed even makes a model called WinkBed Plus that’s designed for individuals weighing up to 500 lb. This very well could be the most durable mattress available online right now. So, for anyone that’s counting, they make three normal models (Softer, Luxury Firm, and Firmer), as well as an updated model for heavier folks.

winkbed mattress review firmness and feel

WinkBed also backs their mattress with a lifetime warranty and a comfort replacement plan. It’s actually surprising to see this caliber of a mattress for under $1,500, and that’s before any discounts.

Helix Sleep


  • Anyone that weighs under 400 lb (Helix makes a bed for everyone)
  • Hot sleepers (Helix has several options for you)
  • All sleep styles (side, back, stomach, combo)
  • Price-concious buyers

When we mention the Helix mattress we’re usually referencing a collection of beds, not just one. In fact, in years past, Helix used to showcase just one mattress, despite the fact that they actually made several different models. This is really the engine behind their “custom” mattress concept. Helix made around 10 mattress models for individuals of all shapes and sizes.

Now, that might seem confusing, but what Helix does is run consumers through a sleep quiz on their site to narrow their search to the most optimal mattress. It really is a clever concept and it’s one of the reasons that Helix is so popular.

helix mattress review firmness and models

The most popular model that Helix makes is called Midnight. It’s about a medium on the soft/firm scale and also about a medium in terms of overall support. It’s a nice bed, but Helix recognizes that it’s not for everyone, which is why they offer 14 other beds.

helix mattress review side sleepers
We can’t imagine people not liking what Helix has to offer

If you’re looking for a firm, supportive bed, they make that. If you want a super soft, pressure relieving bed, they also make that. If you want a mattress with a big, comfy cover, they have that also. Again, the whole goal of Helix is to offer a bed for everyone.

Review Team


Owen Poole

Side Sleeper


McKenzie Dillon

Combo Sleeper

Tharon Green

Stomach Sleeper

Dillon Payne

Dillon Payne

Combo Sleeper

What Do We Know About Mattresses?

A lot, actually! Here at the Slumber Yard, we’ve reviewed upwards of 90 mattresses. For every review we test feel, firmness, edge support, temperature regulation, motion isolation, and more.

We’re not interested in proving a company’s buzzy marketing claims, we just want to report accurate information. Which is why we do our best to be transparent in our testing methods and relationships with various companies.

It’s important to us that our readers know we can be trusted. We work independently of the brands we test, so even if we’re gifted a mattress, we have full control of content. We’ll never oversell a product and we’ll never sell it short either.

What Is A King Size Mattress?

A king size mattress is a size up from a queen, but not as long as a California king. It’s the bed you get when your new room is extra spacious, the bed you put in your first home as a married couple, the bed you finally get to stretch out on.

Compared to a queen, a king will get you an additional 16” in width, though both sizes are 80” in length.

You can see a breakdown of standard mattress dimensions in the table below:

best mattress california king size

Body Type

We touched on body type in relation to king size beds a bit in the above section, but let’s expand and talk about body type in relation to mattresses in general.

When you’re shopping for a mattress online, it’s more than likely that you won’t be able to try the bed before you buy it and have it shipped to your home. So, instead, you’ll have to rely on the descriptions and reviews.

When you’re reading up on a bed’s feel and firmness, always keep in mind that these things are relative to your body weight. The heavier you are, the softer a mattress will feel for you, and the lighter you are, the firmer that same mattress will feel for you.

It’s also a good idea to consider your body type when deciding on what type of mattress construction you want. We generally suggest that heavier folks look for hybrid beds that incorporate coils for added support, durability, and airflow.

Sleeper Type

Your sleeper type plays an important role in choosing a mattress that’s right for you. There are four categories of sleepers that we talk about in our content: back, stomach, side, and combination sleepers.

Back sleepers and stomach sleepers need to look for a bed that will provide enough support for their shoulders and hips. If these heavier parts of the body aren’t properly supported, the spine can arch, causing you to wake up with aches and pains. Typically, these sleepers will prefer a firm king size mattress, as opposed to something on the soft side of the spectrum.

Side sleepers, on the other hand, need proper pressure relief for the hip, arm, and shoulder. If the bed is too firm or doesn’t have enough give in those areas, it will feel like the surface of the mattress is fighting against your body, rather than accommodating it. Again, this can cause a sore wake up in the morning.

Combo sleepers are less defined because some combos spend a lot of time on their back, others spend most of the night on their side, and some split all positions evenly. If you’re a combo sleeper, we suggest you cater to your predominate sleeping position, while considering your body type. We also suggest looking for a mattress with good responsiveness so that you don’t ever feel stuck in the mattress and turning over is easy.

Two More Things For Couples

We thought we should talk about couples in this post because most mattress buyers are looking for a king size bed so that they can share it.

There are a couple of mattress factors that we always like to highlight when it comes to couples: edge support and motion isolation.

Edge support refers to the sturdiness of the sides of a bed. Some mattresses are very soft around the sides, but others are quite stiff. We prefer the stiff edges because they allow you to sleep right on the edge of the bed without feeling like you’re going to roll off onto the floor.

For couples, this is something to think about because it’s fairly common for one partner to hog the middle and the other to end up confined to the mattress’s outside inches.

Motion isolation is another key component of getting a restful night’s sleep while sharing a bed. If a bed has good motion isolation, that means it deadens cross-bed motion. So if one partner tosses and turns all night (or is a light sleeper), or likes to sneak out of bed for a midnight snack, it won’t jostle the other person awake.