King Size Mattresses

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.

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.