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.

arm on purple grid

Each Mattress Purchase Includes

Flexible Financing Options

Check if you prequalify without affecting your credit score

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.

Purple Essential Collection King Size

Our Purple Essential Collection mattresses includes Purple's proprietary GelFlex® Grid for instantly adaptive support + pressure relief. Find perfect solutions to common sleep complaints at our best price. 

On Sale
Best Value
NewDay Mattress
4.7
(558)

King PurpleFlex™ Mattress

The instantly adaptive GelFlex® Grid at a price you'll love.

Great Better Best
Cooling
Comfort
Support
Kings starting at Is dollars Is now dollars
On Sale
Best Seller
The Purple Mattress
4.5
(29641)

King Purple Mattress®

The instantly adaptive GelFlex® Grid that made Purple famous, with comfort foam for added pressure relief.

Great Better Best
Cooling
Comfort
Support
Kings starting at Is dollars Is now dollars
On Sale
Extra Comfort
Purple Plus Mattress
4.5
(29641)

King Purple Plus® Mattress

GelFlex® Grid paired with Ultra Comfort Layer + 2X base foam for extra stability and motion isolation. 

Great Better Best
Cooling
Comfort
Support
Kings starting at Is dollars Is now dollars

Restore Hybrid Collection King Size

Purple's bestselling Restore Hybrid collection has been upgraded. Patented GelFlex® Grid technology combines with all-new comfort layers and responsive coils to deliver the ultimate in cooling comfort, enhanced pressure relief, and instantly adaptive support. Now available in Soft and Firm options.

On Sale
Upgrade to Hybrid
Restore mattress
4.5
(5499)

King Purple Restore™ Hybrid Mattress

Upgrade to the enhanced benefits of GelFlex®Grid with hybrid responsive pressure relief and cooling. 

Great Better Best Ultimate
Cooling
Comfort
Support
Kings starting at Is dollars Is now dollars
On Sale
Most Popular
RestorePlus
4.6
(4830)

King Purple RestorePlus™ Hybrid Mattress

Provides core body support plus extra comfort + cooling benefits, for uninterrupted sleep.

Great Better Best Ultimate
Cooling
Comfort
Support
Kings starting at Is dollars Is now dollars
On Sale
#1 For Cooling
RestorePremier Mattress
4.4
(2169)

King Purple RestorePremier™ Hybrid Mattress

Sleep deeper with best-in-class cooling, superior pressure relief + aligning support for restorative sleep.

Great Better Best Ultimate
Cooling
Comfort
Support
Kings starting at Is dollars Is now dollars

Rejuvenate Luxe Collection King Size

Indulge in luxurious comfort with a Quilted Euro Top—this hybrid collection combines the benefits of a zoned coil system with high-density GelFlex® Grid Plus for maximum body support and pressure relief. 

On Sale
Innovation Meets Luxury
Purple Rejuvenate Mattress
4.4
(13705)

King Purple Rejuvenate™ Mattress

Unlock next-level comfort with the GelFlex® Grid Plus, core body support + a luxurious Quilted Euro Top.

Great Better Best Ultimate
Cooling
Comfort
Support
Kings starting at Is dollars Is now dollars
On Sale
Pillowy-Soft Comfort
rejuvenate plus mattress
4.4
(13705)

King Purple RejuvenatePlus™ Mattress

Upgrade to pillowy softness and minimize motion transfer with advanced, conforming layers + core body support.

Great Better Best Ultimate
Cooling
Comfort
Support
Kings starting at Is dollars Is now dollars
On Sale
Ultimate Bliss
RejuvenatePremier
4.4
(13705)

King Purple RejuvenatePremier™ Mattress

The ultimate luxury sleeping experience — top-of-the-line stacked comfort layers + maximum full body support.

Great Better Best Ultimate
Cooling
Comfort
Support
Kings starting at Is dollars Is now dollars

Benefits of The Purple GelFlex™ Grid

Cushions and 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

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

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.

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 $1395 to $8995.

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 NewDay Mattress - Instantly adaptive – from the GelFlex® Grid, at a price you’ll love.
  • Purple Mattress® - The instantly adaptive GelFlex® Grid that made Purple famous, with comfort foam for added pressure relief.
  • Purple Plus® Mattress - More support, fewer sleep disruptions. Instantly adaptive GelFlex® Grid with double the base support and breathable Ultra Comfort foam to isolate movement.
  • Purple Restore™ Mattress - The perfect balance of responsive support and instant adaptivity for undisturbed, aligned sleep, with stay-fresh antimicrobial options and your choice of soft or firm feel.
  • Purple RestorePlus™ Mattress - A 3” layer of GelFlex® Grid envelops pressure points for advanced relief, with zoned support and breathable Ultra Comfort foam to maintain optimal sleep temperatures.
  • Purple RestorePremier™ Mattress - An exceptionally responsive system of foam-topped, individual coils and 3” of instantly adaptive GelFlex® Grid work in harmony to deliver deeply restorative sleep at optimal sleep temperatures.
  • Purple Rejuvenate™ Mattress - A marriage of quilted comfort and proprietary GelFlex® Grid Plus technology delivers instantly adaptive support, deep relief and decadent, luxurious cushioning.
  • Purple RejuvenatePlus™ Mattress - Release all daytime tension with deep, breathable cushioning, supported by the GelFlex® Grid Plus and zoned coils, for instantly adaptive, body-conforming comfort and targeted support.
  • Purple RejuvenatePremier™ Mattress - A perfect synthesis of cutting-edge sleep science and classic comfort, with multiple layers of responsive, temperature-balancing support and the full pressure-relieving benefits of the GelFlex® Grid Plus.

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.

More ways to explore

woman laying on mattress in showroom

Find Purple in thousands of stores across the country and try out our beds in person.

chat image

Our Sleep Geniuses are here to answer questions and help you find your dream mattress.