What is the Biggest Bed Size?

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What’s the biggest bed size? The answer to that question could be one of several different bed sizes, depending on what you mean by “biggest.” Do you mean the biggest standard bed size? The longest bed size? The absolute largest bed it’s possible to get without having a custom mattress made?

Below, we’ll answer all these questions and discuss what the largest bed size is, depending on what you mean when you ask that question.

Largest Standard Mattress Size: Eastern King

The standard size run goes from the twin size mattress to the California king mattress. The standard or eastern king size bed comes right before the Cal king bed because it’s shorter. Many people take this to mean that the standard king mattress is also smaller overall than the Cal king bed.

However, the 76 by 80-inch standard king mattress is actually the largest standard bed size by total surface area. The standard king size mattress is 6,080 square inches, while the Cal king mattress is 6,048 inches. That makes the eastern king the biggest bed in the standard size run.

The standard king size bed is designed with couples in mind. It offers the exact same amount of width to each partner as they would get in a single bed. That means couples who want the most sleeping space should consider this mattress size.

The eastern king is ideal for master bedrooms because it’s big enough to fill out larger rooms. Queen size beds may leave a bigger room looking a little empty. But king size beds add an air of style and luxury to your bedroom.

That’s why king beds go best in a large master bedroom that’s bigger than 10 by 10 or even 10 by 12 feet, while queen size mattresses are the option of choice for smaller rooms.

Longest Standard Mattress Size: California King

Most of the beds in the standard size run are either 75 or 80 inches long. The California king mattress is the one exception. This bed takes four inches away from the width of the standard king and adds them to the length. That makes the total dimensions of the California king bed 72 by 84 inches or exactly six by seven feet.

The California king is a wonderful alternative to the standard king for couples with an extra-tall partner. If you’re well over six feet tall, you may find your feet dangling off of even an 80-inch bed. But the California king is long enough to accommodate just about anybody.

California king beds were designed to look good in the huge master bedrooms in the opulent mansions common in Southern California. That means these beds will look incredible in a huge master. They can technically fit in the same size rooms as standard kings, but they look a whole lot better in larger rooms, like 12 by 14-foot spaces or larger.

We have guide providing an in-depth comparison of the king vs California king mattresses for shoppers who are unable decide to between the two.

Largest Mattress Size Overall: Alaskan King

If you want the biggest bed of all, you’ll have to look outside the standard size run. Just like Alaska is the biggest state, the Alaskan king size bed is the absolute biggest bed you can get without having a custom mattress made.

This bed is a cool 108 by 108 inches. That’s nine by nine feet, which is big enough to be a room that could hold a full size bed! Most people don’t need a bed this size. Alaskan kings are made mostly for families with multiple small children who all like to co-sleep together or opulent mansions with huge master bedrooms.

Of course, a huge bed needs to go in a huge room. You’ll need a room that’s a bare minimum of 13 by 11 feet. However, a room this size won’t give you space for literally anything other than a bed. If you want nightstands, dressers, and other bedroom furniture, you’ll be better off with a master that’s around 16 by 16 feet.

Other Oversized Mattresses

There are two other oversized mattresses besides the Alaskan king. Though they’re not as massive as the Alaskan king, they’re still pretty huge.

Wyoming King

The Wyoming king bed was named for the state of Wyoming because this 84 by 84-inch bed is a perfect square. Though the state of Wyoming isn’t an absolutely perfect square, it looks close enough to one to get an oversized mattress named after it! Sleepers who want tons of legroom and tons of wiggle room should consider this oversized bed.

Just be aware that you won’t be able to stuff the Wyoming king size mattress in the same bedroom you could a king. You’ll need a room that’s around 12 by 12 feet or 144 square feet to have enough room for your bed and some furniture.

Texas King

Just like Texas is the second-largest state, the Texas king is the second largest oversized mattress. At 80 by 98 inches, this bed is smaller than the Alaskan king and larger than the Wyoming king. The Texas king bed is another fantastic offering for those who want to share their beds with small kids while maintaining their personal sleep space.

With the Texas king, you’ll need an ultra-long room for an ultra-long bed. You can get away with a room that’s around 10 feet wide, but you’ll need it to be at least 12 or 14 feet long to have sufficient space for furnishings.

Oversized Mattress Considerations

You don’t just have to think about your mattress when creating an oversized bed. You’ve also got to worry about bedding and other accessories that match your mattress dimensions, like sheets, bed frames, and more.

Oversized beds aren’t part of the standard size run. So you might have trouble finding accessories that are reasonably priced. For instance, Texas king mattresses are 84 by 98 inches long, which is a lot bigger than the 80 inches of length typical of most standard beds.

So you can expect to pay a lot more for Texas king sheets than standard king ones. And that’s not even factoring in the expense of a Texas king bed frame.

If you get an Alaskan or Wyoming or Texas king, you can also expect to have a harder time moving the mattress and its frame. This can be especially true of an Alaskan king mattress. With this mattress size, you’re literally moving a room. You can take the Alaskan king bed frame apart, but Alaskan king mattresses are a different story.

So co-sleeping families and tall sleepers might sleep comfortably on a bed with more sleeping space. But these sleepers need to consider the tradeoffs, such as extra expense and difficulty moving their mattress.

The Rest of the Standard Bed Sizes

The standard size run includes several smaller mattress sizes other than the eastern king and the Cal king:

Twin

The twin size bed is the smallest of the adult bed sizes at 38 by 75 inches. That makes a twin mattress the perfect size for compact spaces like dorm rooms and studio apartments. The twin mattress is also a great size if you want to have a multi-bed space like a guest room or kids’ room.

Parents with more than two children can also accommodate their little ones in a small room by investing in a bunk bed frame with two twin size mattresses. Lightweight, low profile twin beds are some of the best mattresses for bunk beds.

Twin XL

The twin XL bed is a longer version of the twin bed. At 38 by 80 inches, the twin XL mattress is the perfect bed for tall sleepers who still need a mattress that fits into a compact space. Like the twin, the twin XL mattress goes great in multipurpose guest rooms and multi-bed spaces. It also is a fantastic option for bunk beds!

Full

The full or double bed is 54 by 75 inches. The added width makes this more comfortable than a twin mattress for

While it’s touted as the first bed size that can accommodate couples, the truth is this bed is not quite wide enough for couples to sleep comfortably. It’s a better option for single adults under six feet tall who want some extra wiggle room to toss and turn.

Queen

The queen mattress is the most versatile bed size of all. At 60 by 80 inches, queen beds are perfect for just about anyone. The queen is great for single adults and couples who co-sleep alike. It’s long enough to accommodate all but the tallest sleepers. And it fits in just about every room, big or small. It’s also quite a bit cheaper than the king sizes.

You can do anything with a queen mattress, from purchasing one for your kids to grow into it to using one as a mattress for guest room or your master bedroom. With all this going for it, it’s no surprise the queen is the most popular bed size.

Split King

The split king is not an oversized mattress. It’s the exact same size as the standard king. A split king is two twin XL mattresses in the standard king size bed frame instead of one. That makes it an amazing option for couples who have different needs.

Each partner can select their own mattress firmness level, their own mattress material, and their own adjustable base settings while still sleeping in the same bed. This makes split king size mattresses an excellent option for couples who have different sleep styles or body types.

The split king mattress size also is a good choice for couples where one partner likes to sleep upright while the other likes to lie flat.

Other Non-Standard Mattress Sizes

Not all oversized mattresses are king oversized mattresses. Some oversized mattresses are larger versions of the queen or the full.

Full XL

This oversized mattress is 54 inches wide and 80 inches long. That makes it 75 inches longer than the regular full- sized mattress. So it’s a perfect choice for taller single adults who want the width of the full but need the length of the queen.

Olympic Queen

The Olympic queen is six inches wider than the standard queen. It’s 66 inches wide and 80 inches long. That means this oversize mattress is a great choice for couples who need some extra wiggle room but don’t have the space for a regular king.

California Queen

This oversize mattress is just like the Cal king in the sense that it’s four inches longer than the standard version. The California queen is 60 by 84 inches. That means it’s a wonderful option for couples with smaller bedrooms or very tall single adults who need the length but not the width of a California king.

FAQs

How do I know which bed size will fit in my room?

The general rule for ensuring your bed will fit in your room is to give yourself about two feet of space around three sides of the bed. So let’s say you have a California king, which is six feet wide and seven feet long. That would mean you need a bedroom that is absolutely no less than 10 feet wide and nine feet long to give you the requisite two feet on every side.

However, you also have to think about bedroom furniture. If you want a dresser, armoire, or other storage, you’ll need to have at least two more feet at the foot of the bed or on one side. So for your Cal king bed and a dresser, you would need a room of at least 10 by 11 feet. You will probably need even more space if you want bedroom seating or a vanity.

What is the best bed size for couples?

That depends on what your needs are as a couple. Couples who have a smaller master bedroom probably need a queen size mattress. Couples who like to spread out or toss and turn at night may need a standard king for the width.

Couples who have an extra-tall partner might want a California king for the legroom. Couples who have highly divergent needs might do best with a split king. And couples who co-sleep with their small kids may need one of the oversized mattress options like the Alaskan king. There is no “ideal” bed size for couples. When it comes to the best mattresses for couples, it all depends on what works best for you.

Which bed base is best for my king size bed?

The best bed base for your mattress depends more on what the mattress is made of than its size. For example, you can put any size innerspring mattress on a box spring set of corresponding size because box springs were made for innerspring beds.

However, no matter what size all-foam or hybrid mattress you have, you can never use box springs with it because foam and hybrid mattresses are too heavy for them. You’ll need a king size mattress foundation or platform bed for your king size mattress.

These bed bases swap coil networks for rigid slats. That means they offer sturdy support that can take the weight of heavier mattress types.

Is it hard to get sheets for an oversized mattress?

Oversized mattresses can be fun to sleep on, but one of the biggest disadvantages to them is it can be hard to get accessories for them. You can’t just run out to the nearest big-box store and grab an off-the-shelf sheet set like you can with the standard sizes.

You’ll likely have to order sheets for your oversized mattress online. There are plenty of specialty shops that make sheet sets for non-standard bed sizes. Just remember, you’ll probably be paying a lot more for oversized bed sheets than you would for regular ones. You may also have to pay for shipping.

How much bigger is an Alaskan King than a Wyoming King or Texas King mattress?

An Alaskan king is much bigger than both Wyoming and Texas kings. The Alaskan king bed is a full 24 inches, or two feet, wider and longer than the 84 by 84-inch Wyoming king mattress.

An Alaskan king bed is also 28 inches wider and 10 inches longer than the Texas king. These gigantic dimensions make the Alaskan king bed one huge mattress!

Bottom Line

There are tons of massive bed sizes that can fit your lifestyle. If you want the perfect bed for couples, get a standard king bed. If you want a long bed for a tall sleeper, go for a Cal king mattress.

And if you want the biggest bed of all, the Alaskan king is your friend! The other main oversized mattresses, the Texas and Wyoming king bed, are also good choices for shoppers who want something bigger than a king bed but smaller than an Alaskan king.