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What are the Common Mattress Sizes?

common mattress sizes measuring

What are the Common Mattress Sizes?

common mattress sizes measuring

When it’s time to buy a new mattress most people cannot remember which mattress size is bigger than the other. Is the Queen bigger than a Full? What size is a Twin? And what is the difference between a King Mattress and a Cal King Mattress? Our chart and advice below should help guide you in what bed will fit into your room or space.

Most importantly, though, understanding mattress dimensions and sizes helps you find the perfect fit for your body to ensure the most restful sleep each night. So what are the most common mattress dimensions and sizes in the U.S.?

●     Twin Mattress Size●     38” x 75” x 10”
●     Twin XL Mattress Size●     38” x 80” x 10”
●     Double/Full Mattress Size●     54” x 75” x 10”
●     Queen Mattress Size●     60” x 80” x 10”
●     King Mattress Size●     76” x 80” x 10”
●     Cal King Mattress Size●     72” x 84” x 10”
Diagram of common mattress sizes

Sizing Up Mattress Sizes

How we sleep and where we sleep can depend on our culture as well as our own personal preferences. Bed types are different across the globe; in the U.S., we favor mattresses set within a frame.

The type of mattress and the size of that comfort zone often depend on the needs of the sleeper. Mattress sizes in the U.S. all (mostly) follow the same standard measurements, but buyers need to decide what size is ideal for that perfect ‘good night’s sleep’.

So how do you decide between those six standard sizes? Think about:

  • Your height
  • Your body frame
  • If you’re sharing the bed
  • The size and shape of the room
  • Your nightly movements (do you toss and turn and need more space?)
  • Your budget!

A number of these factors may play a part in the mattress you select. And you may need to weigh your options to determine what size suits your lifestyle… and budget.

Mattress Dimension Chart: Find the Mattress Length that Fits Your Height

So how tall are you? Do you stand taller than six feet? Maybe you’re petite. This isn’t about sizing up height in the right or wrong way. But your height does influence the size of mattress you need for a good night’s sleep.

If you’re tall, you need a mattress that will give you enough leg room. The best choices? Twin XL, Queen and Cal King. But what about the standard double (aka the “full” mattress)?

While a Double/Full could work, the mattress dimension chart below shows that it only allows a few inches of legroom beyond a height of six feet. So those who stretch out at night might wake up to feet dangling off the edge. Not exactly the ideal for a satisfying sleep!

The mattress dimension chart will help you find the right mattress size so that you won’t end up with your feet dangling off the edge!

Mattress Sizes: The Bed Frame and Your Body Frame

Every person’s body size and shape is different. Whether you’re muscular, athletic, lean, plus, curvy, or medium, you need a mattress that fits and suits your personal size and build.

A twin might not provide enough width for muscular body types. When choosing a mattress, choose the dimensions and size that offers plenty of space. It doesn’t matter if you sleep on your back, stomach or side, the mattress should easily accommodate your body.

Looking for the perfect mattress size that comfortably fits two? Opt for Queen, King or California King!

Mattress Sizes: Sharing Space

Married or coupled up? Choose a mattress that easily accommodates two!

Of course, buyers need to consider both body types when choosing a mattress for two. While a full mattress could work for some couples, it will likely be too cramped for others.

Need more space? Opt for Queen, King or California King. Remember, though, that Queen and King offer the same amount of length for those who need more leg space. And the California King provides even more vertical space!

Mattress sizes that are too big will overwhelm a room. Check the dimensions of your bedroom before selecting your mattress size.

Mattress Sizes: Filling Space

While, yes, buyers need to choose the best mattress for their bodies, they also need to consider the room space for the mattress, too.

A bedroom’s dimensions might restrict a buyer’s choices as to the mattress they select. Placing a California King in a small room could easily take up the entire floor!

The bed should be a dominant part of the bedroom, but it can’t completely fill the room. Look to the room’s dimensions as a guide about mattress size.

Consider other items that need to be placed in the room beyond just the bed and mattress. Don’t select a King mattress and bed if it means sacrificing space other furniture in the room — like a dresser and nightstands.

Instead, consider downsizing to a smaller mattress. A Queen is the same length as a King and a little more than a foot narrower. And those inches might make all the difference when arranging that room.

Mattress Sizes: Room to Move

Some buyers just want all the space they can buy because they move so much during the night! How you sleep determines the size of where you sleep.

Those who roll around, who like to spread their bodies across the bed or who tend to wake up in crazy positions may benefit for larger mattress sizes. Of course, if you sleep neatly on the side of the mattress each night, then a full size might be perfect!

Size up how you sleep and consider your nightly routine when deciding mattress size.

Mattress Sizes: Counting Dollars, Cents…and Sheep

Physical comfort is imperative to a healthy, happy and restful sleep. But the mattress also can’t break the budget… because overspending and stress will cost you zzz’s, too!

So how much should you spend for that mattress? Is there a particular dollar amount? Really, how much you spend is a personal choice that is dictated by your own financial situation.

Before you hunt for that perfect mattress, you need to set a budget so you know just how much you can spend. Be reasonable about your budget and don’t overextend your finances.

Will you pay for the mattress all at once? Perhaps you have savings set aside?

Or maybe that old mattress is so busted up and worn that you just can’t wait any more. So if you don’t have savings or a monthly surplus, how do you pay for that new mattress?

At 2920 Sleep, we give buyers payment options. With financing available you can make payments monthly. But you’ll need to be approved for the monthly payments. Once you’re approved, though, you’ll know exactly how much you need to allocate each month toward that new purchase.

This means that a big purchase like a King sized mattress can be broken down into smaller installments over a longer term if needed.

Use the mattress dimensions chart to help find the perfect mattress size for you. Remember that a mattress that’s too small may leave you cramped and uncomfortable.

Mattress Sizes: Good Sleep, Bad Sleep & Your Mattress

While the size of the mattress affects personal comfort and sleep, tossing and turning isn’t always about the mattress size.

So what else could be impacting your sweet dreams? Obviously, illnesses or medical issues could play a role. However, if there are not medical issues interfering, then consider:

  • The noise level. Is it too quiet? Too loud? Ambient noise like a fan or music could help promote sleep.
  • Room temperature. Some people cannot sleep if it’s too hot or cold in the room. Consider using a fan or add more blankets.
  • Pillow preferences. The pillow may also play a role in sleep. Like a mattress, buyers need to find the perfect pillow for their comfort. You may like firmer pillows under your head. Or maybe softer is better.
  • Exposure to blue light. Do you like to have screen time before bed? The blue light from tablets, phones, computers and televisions may be interrupting your body’s natural sleep rhythms. Stop the screen time a few hours before bed; read a book instead!
  • Caffeine intake. Caffeine is found in many foods and beverages. While that jolt of coffee may keep you wired, it’s terrible for sleep. Skip caffeinated beverages and foods. Crazy fun fact? Chocolate chips (semi-sweet, 6 oz.) has almost twice as much caffeine as a Mountain Dew (the beverage widely known for caffeine!).

But what about that mattress? Could your mattress be affecting your sleep… beyond just the size factor and dimensions? Yes!  In fact, there are many other mattress issues that could be impairing your nightly rest like:

  • Coil Construction: Many mattresses are made with an innerspring coil construction. Some bodies just don’t like the feel of coils as they might not give enough comfort or pressure relief. And if a coil pops, this could cause discomfort and restless sleep.
  • Memory foam that doesn’t breathe: Some buyers discover that memory foam mattresses cause them to feel too hot at night. Look for a non-memory foam (or poly foam) mattress that breathes or that includes cooling tech… like all our mattresses!
  • Age: The comfort of a mattress fades with age. If you’ve had your mattress for more than seven years, then it’s likely past its prime and could be causing you to lose sleep.
  • Support issues: Some mattresses are firm, others soft. The top layer of the mattress might not be providing enough pressure relief. If you’re waking up stiff or in pain and the mattress isn’t too old, then a combination of lack of support or pressure relief might be your source of unrest.

Mattress Sizes: Shopping for a Kid’s Room or the Guest Room

Some buyers aren’t hunting for a mattress for personal use, but maybe for a kids’ room or a guest room. So how do you choose the perfect mattress for someone else?

Kid-Friendly: Twin & Twin XL

Many buyers choose twin beds for kids. This mattress size is the perfect choice for bunk beds and single beds. Growing kids—especially grade schoolers—don’t need a ton of space.

Parents also may want to maximize floor space for toys, desks and other furniture, and the smaller size of Twin mattresses make them easier to nudge into corners.

Twin XL though, is a great choice for teens, especially when they are hitting growth spurts. The mattress still takes up less width in the room, but the longer length gives growing bodies more space. Many college dorm rooms have Twin XL mattresses.

The Case for Full

Full beds provide more width than a twin, but the length is the same. So this mattress size is great for kids or teens who like to move around in their sleep or just need more space for favorite toys or more pillows.

While you may be leaning towards a full mattress for a guest room, this mattress size might not be a sufficient size for some guests (especially for couples).

Queen, King and California King

Queen is one of the most popular mattress sizes for couples…and many choose this mattress size for guest rooms too. The measurements are generous for couples and the size doesn’t overwhelm a smaller guest room.

King might be a great choice for a larger guest room, but, again, buyers really need to look at the room’s size to see if a larger mattress (and bed) is the best choice.

King and California King also are more expensive. If you’re looking to furnish a guest room, your budget might be limited.

Sizing it All Up: The Mattress Chart

So how do you visualize the size of a mattress if you’re buying online? How can you see the size difference between all six standard sizes? While you may see a difference of 1” between different manufacturers, Twin, Twin XL, Full, Queen, King and California King are all basically the same length and width for a given size.

Mattress Chart: What about the Box Spring

If you’re reviewing the mattress dimensions chart, you may spot something amiss. There is no mention of the box spring and its dimension.

Many buyers choose a box spring to add more support to the mattress. But this is not a necessity. Box springs are an option, not a must.

If you want to use a box spring under your mattress, what size box spring should you choose? This isn’t too complicated, as box springs come in the same dimensions as their mattress counterparts.

But there are a few exceptions: King and California King. These two mattress sizes actually require two Twin (or Twin XL for California King) box springs.

If you’re purchasing twin mattresses for bunk beds, then you don’t use a box spring. Instead bunkie boards are used beneath the mattress to provide additional support.

Some bed frames also provide a board that supports the mattress, and this makes a box spring unnecessary.

Of course, some people just don’t want a spring below their mattress. Again, the choice is all about personal comfort.

While the most common mattress dimensions are Twin, Twin XL, Full, Queen, King and California King, many factors determine the size that each buyer selects. Your body type, height, budget, sleeping habits, sleeping partners and bedroom size all affect the mattress size you purchase.

If you’re confused, use the mattress dimension guide to visualize the measurements of each size to help determine the perfect fit for your lifestyle and bedroom…and ensure the sweetest dreams every night.

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