King Mattresses(113+)

A king size mattress is 80 inches long by 76 inches wide, making them more than a foot wider than queen mattresses. King mattresses are an excellent choice if you need more room to spread out. If you share a bed, a king mattress gives you more horizontal space than any other mattress size — including other types of king sizes. As long as you’ve got enough space in your room, you can’t go wrong with a king size bed and mattress.

As long as you’re looking at standard king size mattresses, they’ll all be the standard size of 80 inches by 76 inches. The beds and mattresses at Sam’s Club are all made to meet industry standards, so you can count on your sheets and other bedding to fit. When you measure your room to see if you can fit a king size bed, remember that bed frames can be a little larger than mattresses.

There are a few types of mattresses that are similar to or larger than a standard king size mattress. California king mattresses aren’t quite as wide, but they’re a few inches longer. There are also less common types of king mattresses, like Alaskan kings, Wyoming kings, and Texas kings. These mattresses are harder to find, but there are larger mattress sizes if you have the space in your home.

If you’re upgrading from an old full or queen mattress, it may be worth upgrading to a king if you have the space and need a wider bed. King mattresses offer a nice combination of width and length, and it’s easy to find bed frames and bedding to go with your mattress. You still get the same length as a queen mattress, but you have a little more room if you need to share your bed. Plus, you can find everything from king memory foam mattresses to firm Euro top mattresses.

A standard king is 76 by 80 inches, and a California king is 72 by 84 inches, so it’s four inches narrower and four inches longer. California king works well for taller sleepers or in rooms with a longer, narrower layout. The standard king gives more total width, which most couples prefer.

Many king mattress orders at Sam's Club qualify for white glove delivery, where a team brings the mattress into your home and sets it up for you. Check the individual product listing to confirm delivery options available in your area.

A medium or medium-firm hybrid mattress tends to work well as a middle ground for couples with different sleep needs. The coil and foam combination provides a balanced feel that works for a range of sleep positions. Some couples also use two twin XL mattresses side by side to create a king with fully customized firmness on each side.