King Size Mattresses

No other mattress features the Purple GelFlex™ Grid, a layer of flexible gel that’s firm enough to support your frame, but soft enough to reduce tension and pressure. It’s comfort that’s great for your whole body.

Each Mattress Purchase Includes

Flexible Financing Options

As low as 0% APR.

10-Year Warranty

If there's something wrong with your mattress, we'll replace it for up to 10 years, starting from the date of original purchase.  

100 Night Trial

Your 100-night trial begins the day your mattress is delivered to your doorstep. If you decide it isn't a perfect fit for you within the first 100 nights, we'll have it picked up and issue a full refund. (Awesome, right?)

Free Shipping

Get your mattress shipped straight to you at no extra cost – with complimentary white-glove delivery available for select mattresses.

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Essential King Size Collection

Our Essential Collection mattresses include the GelFlex Grid for instantly adaptive support and pressure point cradling and a supportive foam core that produces less bounce when you move.

On Sale
New

King Purple NewDay Mattress

Firmer feel with instantly adaptive support. 

NewDay™ is our essential mattress, delivering the instantly adaptive support of GelFlex Grid construction for an introduction to amazing Purple sleep. 

Support

Cushioning

Air Circulation

Pressure Relief

Comfort Layers

2 Layers

Mattress Height

8 Inches

Feel

Firmer
Kings starting at or as low as
$100 off Mattress
4.4
(31361)

King Purple Mattress

Medium-firm, very stable feel and instantly adaptive support

Step up to even more comfort with the Purple Mattress®, the model that started it all, with the 2" of GelFlex Grid and the dual-layer Comfort Core.

Support

Cushioning

Air Circulation

Pressure Relief

Comfort Layers

3 Layers

Mattress Height

9.25 Inches

Feel

Medium-Firm
Kings starting at or as low as
$600 off Mattress + Adjustable Base
4.4
(31361)

King Purple Plus Mattress

Medium, stable feel and instantly adaptive support

Get more cushioning with the Purple Plus®, which pairs 2" of GelFlex Grid with a triple-layer Comfort Core for an extra layer of premium foam.

Support

Cushioning

Air Circulation

Pressure Relief

Comfort Layers

4 Layers

Mattress Height

11 Inches

Feel

Medium
Kings starting at or as low as
$700 off Mattress + Adjustable Base

Premium King Size Collection

Our Premium Collection mattresses pair the GelFlex Grid for instantly adaptive support and pressure point cradling with the Responsive Coil Core for ease of movement and better air flow to draw more heat away.

4.4
(5964)

King Purple Hybrid Mattress

Firm, responsive feel and instantly adaptive support.

The firmest mattress in our Hybrid Collection, the Purple Hybrid® Mattress combines the pressure-relieving benefits of the GelFlex Grid with the buoyancy of individually wrapped coils.

Support

Cushioning

Air Circulation

Pressure Relief

Mattress Height

11 inches

Grid Height

2 Inches

Feel

Firmest
Kings starting at or as low as
$700 off Mattress + Adjustable Base
On Sale
Best Seller
4.4
(5978)

King Purple Hybrid Premier 3 Mattress

Medium-soft, very responsive feel and more instantly adaptive support.

The medium-soft mattress in our Hybrid Collection, the Purple Hybrid Premier® 3 Mattress combines the pressure-relieving benefits of 3 inches of the GelFlex Grid with the buoyancy of individually wrapped coils.

Support

Cushioning

Air Circulation

Pressure Relief

Mattress Height

12 inches

Grid Height

3 Inches

Feel

Medium-Soft
Kings starting at or as low as
$800 off Mattress + Adjustable Base
4.4
(1926)

King Purple Hybrid Premier 4 Mattress

Soft, most responsive feel and the most instantly adaptive support.

The softest mattress in our Hybrid Collection, the Purple Hybrid Premier® 4 Mattress combines the pressure-relieving benefits of 4 inches of the GelFlex Grid with the buoyancy of individually wrapped coils.

Support

Cushioning

Air Circulation

Pressure Relief

Mattress Height

13 inches

Grid Height

4 Inches

Feel

Softest
Kings starting at or as low as
$800 off Mattress + Adjustable Base

Benefits of The Purple GelFlex™ Grid

Cushions and supports

Cushions + Supports

The Grid’s columns give way under focused pressure from hips and shoulders to gently cradle your body, while offering support to broad, evenly distributed weight (lookin’ at you, legs and back).

Dissipates Body Heat

Dissipates Body Heat

The Grid features 1,400+ ventilation chambers for better airflow. Plus, when it comes to temperature, our GelFlex material is like Switzerland – totally neutral – so you won’t sleep too hot or too cold.

Adapts as you move

Adapts as You Move

The GelFlex Grid instantly shifts as you change your sleeping position. When you move, it moves, so you feel every inch of comfortable support and your sleep remains blissfully uninterrupted.

Let our sleep experts help you discover better sleep.

Is a King Size Right For Me?

  • A king-size mattress is 16 inches wider than a queen-size mattress and also the same size as two twin XL mattresses pushed together.
  • The king-size mattress is ideal for a room that is at least 12 by 12 in order to comfortably accommodate your king-size bed.
  • Most people would agree that the best mattress for couples is a king-size mattress. The king will comfortably fit couples with extra room to spare.

Mattress Size Guide

Crib: 28" x 52"   Toddler: 28" x 52"    

Twin: 38" x 75"  Twin XL: 38" X 80"   

Full/Double: 54" x 75"  Queen: 60" x 80"  

King: 76" x 80"  California King: 72" x 84"

Mattress Size Guide
mattress size guide

Frequently Asked Questions

King size mattresses can vary widely in price. Purple king size mattresses range in price from $1399 to $4998.

King Size Purple Mattress

King Size Purple Hybrid

King Size Purple Hybrid Premier with 3” or 4” Purple Grid™

If you’re looking for the best king size mattress, you can’t go wrong with Purple. Only Purple Mattresses have the Purple Grid. Our patented Hyper-Elastic Polymer comfort layer makes you feel like you’re floating in zero gravity. Purple king mattresses provide luxurious no-pressure support and superior comfort. Be sure you have a King size bed frame to fit your mattress.

Your Purple Mattress also includes free shipping and returns, a 10-year warranty, and a 100-night mattress trial. Try a king size Purple mattress risk-free. If you don’t like it, we’ll take it back for free and give you a full refund.

The best king size mattress provides optimal support for your body and sleep style. Thanks to the unique properties of the Purple Grid, you can expect a great night’s sleep no matter your body type or sleeping position. Our unique Purple Grid provides adaptive support, contouring comfort, and maximum breathability. The Hyper-Elastic Polymer material adapts to your body to deliver no-pressure support and zero-gravity comfort.

Purple has a king mattress for every sleeper:

Purple Mattress: Known as “The Bed that Broke the Internet”, the Purple Mattress features a 2-inch Purple Grid with a high-density foam base, delivering a luxury sleep experience on an affordable king size bed.
Purple Hybrid: A base layer of individual pocket coils and a 2-inch Purple Grid top layer provides enhanced support and more responsiveness.
Purple Hybrid Premier: Our most luxurious mattress, the Purple Hybrid Premier features responsive pocket coils and plush comfort. Choose a 3-inch or 4-inch Purple Grid layer for the ultimate zero-gravity experience. You have to feel it to believe it!

There’s no other mattress like Purple, which may be why Purple was rated No. 1 in customer satisfaction by J.D. Power and Associates. Purple beat every other bed-in-a-box brand and achieved the highest score in the following categories: Support, Comfort, Durability, Warranty, and Value.

If you find yourself in one of the following categories, you should consider buying a king size mattress.

You sleep with a partner: King mattresses make great choices for couples who love to stretch out and make the most of their beds. 

You like to chill in bed: Nowadays, we spend a lot more time in bed. If you like to read, watch Netflix, or just hang out in bed, getting a king mattress will make your sack time more enjoyable.

You are a light sleeper: Does your partner wake you up with the slightest movement? A king mattress can help by putting more space between you and increasing motion isolation. 

You have a big bedroom: Don’t underestimate the power of Feng Shui! A big bedroom deserves a matching king size bed. 

You want a luxurious sleep experience: There’s nothing like having a massive bed to snuggle up in. If you want the ultimate in luxury sleep, you’ll love a king size mattress.

The best place to buy a king size mattress is right here at Purple. Not only can you get the best bed-in-box mattress at a great price, but you also get free shipping and returns, a 100-night no-risk sleep trial, and a 10-year warranty. 

Purple also partners with top mattress stores around the country. If you prefer trying a mattress in person, you can use our handy store locator to find a Purple mattress retailer near you.

Not quite. While two twin mattresses are the same width as a king mattress, they are 5 inches too short. However, two twin XL mattresses are the same size as a king mattress. This is known as a split king. A split king measures 76 X 80 inches, just like a standard king. Split king mattresses are best for:

* Using with a split adjustable bed frame (the most common reason to get a split mattress)
* Couples who have very different sleeping preferences and want two different mattresses
* Super light sleepers (split mattresses help eliminate motion transfer)

Purple's split king mattresses go especially well with the split king Purple Power Base, an adjustable bed frame featuring a wireless remote to control your mattress. This high-tech bed frame also includes LED lighting, USB charging, massage mode, and zero-gravity mode for a true weightless sleep experience. 

California king beds are longer and narrower than standard king beds. Let’s take a look at the difference in King vs Cal-King mattress sizes:

King Mattress: 76 X 80 inches
California King Mattress: 72 X 84 inches

The king mattress is wider than the Cal king, but it’s also shorter. For most sleepers, a king size bed mattress will do. The California king mattress size is designed especially for sleepers who are extra tall and need a few more inches of leg room. Another reason you might opt for the Cal king is to better accommodate your bedroom. For some bedrooms, a 76-inch mattress may be too wide. If you want spacious luxury without downsizing to a 60-inch queen, a California king is a good choice.

No, we do not charge a delivery fee. We offer free shipping on all orders to the 48 contiguous states. All Purple mattresses come with a 100-night mattress trial, so you can try your king size mattress risk-free. We also offer free returns if you’re not satisfied. In the unlikely event that there’s a problem with your order, we’ll pick up the mattress for free and give you a full refund.

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