Many of the best king-size mattresses are on sale for the 4th of July, including our best overall pick, the Helix Midnight Luxe. For more deals, check out our roundup of the best 4th of July ...

The SF 10-inch King Mattress is now on sale for $228, 50% off the typical $460 most people would pay for it. It’s CertiPUR US Certified for safety, comes with a 100-night trial, and the SF ...

It's not just on sale in a king size, though—you can get either the full or the queen in the 10-inch model, too, each for around half off as well. SF 10-Inch King Memory Foam Hybrid Mattress ...

The SynthoSpace 10-Inch King Memory Foam Mattress retails for $942, but it's currently on sale at Walmart for just $219, which is a 77% discount that can save you a jaw-dropping $723. Savings ...

Enter: the best king size mattresses, which offer more space than any other standard option. For those with space in their bedrooms to accommodate a king, sleeping on one can feel, well, regal.

The Ophanie King Air Mattress is on sale at Walmart for only $70. It won't last long at this price point, so get one while you still can. If you do, you can rest assured that you got a great deal.

The Simmons Mattress Company just came up with this size in the ‘50s, calling it king-size so that you could have a mattress akin to royalty. Do royals sleep on king mattresses these days? No idea.

Here's everything to consider before ordering that new king-size bed. ... It is reasonably priced, too; it normally retails for $1,600, but you get it on sale now for only $1,200.

The Allswell is the firmest bed on our best king-size mattress list, at 6.3 out of 10. The softest, at 3.1, is the Soft side of the flippable Layla Hybrid bed. How we test king-size mattresses ...

A split king-size mattress is two twin XL mattresses pushed together, each measuring 38 inches wide by 80 inches long. Harris says, ...