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
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 refund. (Awesome, right?)
Three unique mattresses. Proven deeper sleep.
Every Purple mattress uses our patented GelFlex Grid for one-of-a-kind pressure relief, support, adaptability, and cooling.
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 x 12 feet 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.
Exclusively at Purple
Exclusively at Purple
Revolutionary GelFlex Grid comfort
Our proprietary technology reduces pressure and provides support, adapting to your every move for unparalleled comfort.
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Frequently Asked Questions
King size mattresses can vary widely in price. Purple king size mattresses range in price from $1,599 to $8,995.
If you’re looking for the best king size mattress, you can’t go wrong with Purple. Only Purple Mattresses have the GelFlex 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 easy returns, a 10-year warranty, and a 100-night mattress trial. Try a king size Purple mattress risk-free.
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 easy 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 Adjustable 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 easy returns if you’re not satisfied. We do ask all customers to spend at least 21 nights on their mattress before starting a return or exchange so their bodies have enough time to adjust to Purple’s unique feel and support. If you’ve tested out your new mattress for 21 days and you’re within the 100-night trial period, reach out to our Care Team at 1-888-848-2305 to schedule pick up. Upon sending proof of receipt issued at pick-up, we will initiate a refund that may take up to 10 days to turnaround from financial institutions. Please visit our dedicated Returns & Exchanges Page for a full detail.
While the six standard mattress sizes suit most sleepers, some individuals may require a nonstandard bed size. Families who co-sleep with multiple children or pets and tall or heavier individuals may sleep better in a bigger bed. Keep in mind that most nonstandard bed sizes are much less common and typically only sold online or as custom made-to-order mattresses.
Oversized Mattresses
Anything larger than a standard king bed is considered an oversized mattress. Below are a few of the most well-known extra large mattresses.
- Olympic queen: 66-by-80 inches
- Wyoming king: 84-by-84 inches
- Texas king: 80-by-96 inches
- Alberta king: 96-by-96 inches
- Alaskan king: 108-by-108 inches
- Family beds: 108 to 144 inches in width and 80 to 84 inches in length
Other Specialty Mattresses
The following bed sizes are examples of specialty mattresses, several of which are most common in RVs or other camping or recreational vehicles with sleeping areas.
- Full XL: 54-by-80 inches
- Short queen: 60-by-75 inches
- Short king: 72-by-75 inches
- Super king: 72-by-78 inches
