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One of the questions I’ve heard more often than others is, “What size bed should I get?” If you are in the market for a new mattress, choosing the optimal size tops the list of factors determining whether you’ll sleep soundly or wake up teetering on the edge.
Getting the mattress size right makes sense, considering that about 1/3 of our lives are spent asleep, and nearly 1/6 is spent watching TV or scrolling the internet in bed. Many people will spend half their lives lying on their mattresses, yet a YouGov poll says that “40% of Americans don’t wake up feeling well-rested.”
Ready to determine what size mattress you need to meet your needs? Please keep reading to hear my insights.
Hello, I’m Ryan Poppie, Chief Bedmaker at The Beloit Mattress Company. With decades of experience handcrafting high-quality mattresses, I’ve gained a deep understanding of the importance of sleep and choosing the right bed size for optimal comfort, space utilization, and overall sleep quality.
The ideal mattress size hinges on essential factors:
- The dimensions of your room
- The number of people sharing the bed and their sizes
- Their preferred sleep position
- Your budget
Whether you’re a single sleeper in a cozy apartment, sharing your bed with a partner and pets, or accommodating a co-sleeping family setup, selecting the appropriate mattress size ensures a restful and comfortable night’s sleep for everyone involved.
I wrote this guide to assist you in navigating through the different mattress sizes available and to help you find the perfect fit for your unique lifestyle and sleeping arrangements.
What Size Bed Should You Get? Does Mattress Size Matter?
As it relates to impacting your sleep – it does!
Think of your mattress as the foundation of a good night’s sleep. An improperly sized mattress that is too small will constrain a natural sleeping position. Imagine a single bed mattress that’s too small – it’s like trying to fit into shoes that are too small. Uncomfortable, right?
Listen to this short video I made where I answer this specific question.
A mattress should be your sleep sanctuary, spacious enough for everyone – kids, pets, and you. It’s about creating a sleeping surface to stretch, turn, and dream without constraints. According to a study by Slumber Cloud, a staggering 75% of people believe their mattress comfort could be improved. This isn’t just about the mattress material or firmness; it’s often about size.
- Sleeping on a mattress that’s too small can be the root cause of waking up tired and irritable. It’s not just about personal comfort; it’s about health. A cramped mattress can lead to awkward sleeping positions, aches and pains.
- And if you’re sharing your bed, the mattress dimensions becomes even more crucial. Have you ever been crawled up on the edge while your partner sprawls out? You’re not alone. Research indicates that 21% of married individuals feel their partner dominates the bed space.
So, yes, size does matter when it comes to mattresses. It’s the difference between waking up refreshed or longing for a nap. Choose a mattress that gives you plenty of space to sleep peacefully.
Remember, your mattress size can be the secret ingredient to unlocking the best sleep of your life.
3 Factors to Consider When Choosing the Right Mattress Size
In choosing the right size, consider the room dimension, the layout of your room, the number of sleepers and their heights, and even the future needs and flexibility you may need. Partners should be able to rest both hands behind their heads (elbows sprawled) without bumping into each other. Your mattress must fit through any doorways, corridors, and stairwells leading to your bedroom.
Room Dimensions and Layout
The size of your bedroom is an important factor in choosing the right mattress. Measure the room and ensure two feet to 36″ of clearance around the bed so you can move around comfortably. A well-proportioned bedroom layout enhances functionality, so consider the available space before settling on a mattress size. This balance is key to creating a harmonious and relaxing environment.
# of Sleepers & Their Height
When selecting a mattress, the number and height of the people sleeping on it are essential considerations. Solo sleepers often find comfort in twin-size beds or full-size mattresses, while couples may prefer the spaciousness of a queen-size bed or California king mattress. Additionally, taller sleepers may need an extended mattress, such as a Twin XL bed or a Wyoming King, for maximum comfort.
For families who co-sleep, you may consider larger options like family-size beds.
Future Needs and Flexibility
Choosing a mattress size isn’t just about your current situation; it’s also about anticipating future needs. Life changes such as moving to a new home, changes in family size, or even evolving sleep preferences can affect your needs. Selecting a mattress that can adapt to these potential changes ensures long-term satisfaction and avoids the need for frequent replacements. Consider a larger bed size that offers flexibility to accommodate.
Now Let's Discuss The Available Mattress Sizes
With all the mattress sizes available, from twin beds to the expansive Texas king and even the super king and oversized family beds returning to the market, knowledge will empower you to make an informed decision that aligns with your space, comfort needs, and lifestyle. This will ensure that your choice fits your bedroom and enhances your sleeping experience.
This graphic gives you a visual of how many people can ideally fit in each size.
Looking for RV mattress sizes?
Maximum Sleeper Heights and Minimum Room Sizes
In the following mattress size chart, I’ve included all the sizes in inches and centimeters, the maximum sleeper heights, and the recommended room sizes (minimum) per mattress size.
| Mattress Size | Dimensions in Inches | Dimensions In Centimeters | Maximum Sleeper Height | Minimum Room Size |
| Twin | 38.5″ x 74.5″ | 97.79 x 189.23 cm | 5’9″ and under | 7 ft x 10 ft |
| Twin XL | 38.5″ x 79.5″ | 97.79 x 201.93 cm | 6’2″ and under | 8 ft x 10 ft |
| Full | 53.5″ x 74.5″ | 135.89 x 189.23 cm | 5’9″ and under | 10 ft x 10 ft |
| Queen (most popular) | 59.5″ x 79.5″ | 151.13 x 201.93 cm | 6’2″ and under | 10 ft x 11 ft |
| King | 75.5″ x 79.5″ | 191.77 x 201.93 cm | 6’2″ and under | 12 ft x 12 ft |
| California King | 71.5″ x 83.5″ | 181.61 x 212.09 cm | 6’6″ and under | 12 ft x 12 ft |
| Family King Lite | 107.5″ x 79.5″ | 273.05 x 201.93 cm | 6’2″ and under | 15 ft x 9.5 ft |
| Family King | 119.5″ x 79.5″ | 303.53 x 201.93 cm | 6’2″ and under | 16 ft x 9.5 ft |
| Family King Max | 143.5″ x 83.5″ | 364.49 x 212.09 cm | 6’6″ and under | 18 ft x 10 ft |
The Most Common Mattress Sizes
Below are the standard mattress sizes in the U.S., along with some general feedback.
Twin: 38.5” (W) x 74.5” (L)
- Overview: The Twin mattress is the smallest standard mattress size and is ideal for children and teenagers.
- Best For: Perfect for most children and teenagers and suitable for adults with limited space.
- Room Size: Fits comfortably in small bedrooms or multi-use spaces, making it an excellent choice for compact living areas.
Twin XL: 38.5” (W) x 79.5” (L)
- Overview: The Twin XL mattress offers extra length compared to a standard Twin, ideal for taller individuals in compact spaces.
- Best For: Great for college dorms, teenagers, and taller individuals who need more legroom.
- Room Size: Ideal for narrow spaces and smaller rooms, providing extra length without taking up more width.
- Tip: Two Twin XL’s make up for a California King when you want individual adjustable bases.
Full: 53.5” (W) x 74.5” (L)
- Overview: The Full mattress offers more width than a Twin and is suitable for single sleepers under 5 feet 9 inches tall.
- Best For: Ideal for single adults or teenagers and increasingly popular for younger children’s bedrooms for extra space.
- Room Size: Works well in small to medium-sized bedrooms, balancing comfort and space efficiency.
- Tip: Parents are increasingly choosing a Full bed over a Twin bed for teenage bedrooms and some guest bedrooms for kids.
Queen: 59.5” (W) x 79.5” (L)
- Overview: the Queen-size mattress provides additional width and length. The added space makes it a popular choice for couples.
- Best For: Perfect for couples, guest rooms, and single sleepers who enjoy more space.
- Room Size: Suitable for smaller master bedrooms and guest rooms, fitting comfortably while leaving room for other furniture.
- Tip: Statista reports that the Queen mattress is by far the most popular mattress size, with 47% of American adults sleeping on a Queen bed. King is next at 19%, followed by Full at 14%.
King: 75.5” (W) x 79.5” (L)
- Overview: The King mattress is about 18″ wider than a queen and offers substantial space for couples, providing each person with ample personal space.
- Best For: Ideal for couples seeking maximum personal space, families with children or pets joining them in bed.
- Room Size: Requires a larger bedroom to accommodate its size and ensure a comfortable fit with other bedroom furniture.
- Tip: Size can also be a problem. Even with a “split box spring” (two twin-size foundations to support it), it may be too big for some bedrooms or bulky to navigate through corridors, doors, and stairwells.
California King: 71.5” (W) x 83.5” (L)
- Overview: The California King is 5 inches narrower and 4 inches longer than a regular King and is popular on the West Coast.
- Best For: Suitable for very tall individuals or those preferring extra length without the full width of a standard King.
- Room Size: Best for large bedrooms with enough room for a longer bed while maintaining room for additional furniture and movement.
- Tip: With California Kings, regular king-size sheets and mattress covers won’t fit. So be sure you’re buying all the suitable bed dressings to accommodate this narrower and longer mattress.
Family King Lite
- Overview: Measuring 107.5″ x 79.5″ (273.05 x 201.93 cm), the Family King Lite resembles two Full XL beds side by side. Offers a generous sleeping area while maintaining a balance with the overall room space.
- Best For: Ideal for medium-sized families or couples who love extra space. Perfect for those who enjoy a spacious bed without overwhelming their bedroom.
- Room Size: Fits well in moderately sized bedrooms, allowing additional furniture and walking space
Family King
- Overview: The Family King, at 119.5″ x 79.5″ (303.53 x 201.93 cm), is equivalent to two Queen-sized beds. This bed offers a luxurious amount of space, making it a great middle-ground for families seeking both comfort and room to grow.
- Best For: Designed for larger families or parents co-sleeping with young children. It’s a great fit for 2 to 3 kids, providing ample space for everyone.
- Room Size: Requires a larger bedroom to accommodate its size comfortably while leaving room for other bedroom essentials.
Family King Max
- Overview: The Family King Max is as large as two California Kings combined with dimensions of 143.5″ x 83.5″ (364.49 x 212.09 cm). It’s the epitome of plush comfort and space, offering an unrivaled sleeping experience for the largest of families.
- Best For: The ultimate choice for large families (3+ children) or those desiring the most expansive sleeping space available.
- Room Size: Ideal for spacious master bedrooms, ensuring the bed fits comfortably with ample room for additional furniture.
What Size Bed Should I Get for My Height?
Take your height and add 6 inches, then select the mattress longer than the length you calculated. Choose Twin or Full (74.5” L) if you’re under 5’9″ · Twin XL, King, or Queen (79.5” L) if you’re under 6’2” · Cal King (83.5” L) or custom if you’re over 6’6”. That being said, you’ll also want to consider whether you’re sleeping with another person. The bigger the width, the more space you and your sleeping partner will have.
You can use the US bed sizes below to see which mattress works best for you.
- Twin (74.5” L) = Good for anyone under 5’9”
- Twin XL (79.5” L) = Good for anyone under 6’2”
- Full (74.5” L) = Good for anyone under 5’9”
- Queen (79.5” L) = Suitable for anyone under 6’2”
- King (79.5” L) = Good for anyone under 6’2”
- Cal King (83.5” L) = Good for anyone under 6’6”
- Family King Lite (79.5″ L) = Good for anyone under 6’2”
- Family King (75.5″ L) = Good for anyone under 6’2”
- Family King Max (83.5″ L) = Good for anyone under 6’6”
If you’re taller and need a custom-size mattress, you can request a fast and free quote here.
How can I tell what size mattress I have?
One of the best ways to determine which mattress size is right for you is to consider your current mattress size.
- Is it too short?
- Do you and your sleeping partner constantly bump into each other in bed?
- Does your current mattress take up too much room?
Many mattresses will also have a tag (usually on the lower-left corner) that says the mattress’s size.
Take note of what you like and don’t like about your current mattress size, and then decide if sizing up makes sense. Consider a custom queen mattress if you have a queen size but your feet are close to the edge, and your room doesn’t have the extra width for a king.
Let's Discuss Mattress Size vs. Mattress Thickness
Mattress size and thickness may seem interchangeable, but they are distinct characteristics that serve different purposes. Whether it’s an RV twin mattress or a larger bed at home, size dictates the dimensions, while thickness impacts the cushiness and support level.
Mattress thickness can range dramatically, even among the exact sizes. For instance, a full mattress or RV full mattress can be five to 16 inches thick. While there is no set-in-stone standard for thicknesses among mattress manufacturers, many tend to base their thickness on the following measures:
- Low profile – 2 to 5 inches
- Slim – 5 to 8 inches
- Standard – 8 to 12
- Deep, thick, or tall – 12 to 16 inches
- Extra deep, extra-thick, or extra tall – 16 inches+
So, how do you determine the ideal thickness for your needs? A thicker mattress tends to give more support and more cushioning compared to a thinner mattress.
That being said, body weight, more than anything, should dictate how thick your mattress should be. Heavier individuals require extra thickness for contouring and to prevent sagging. As a general guideline, people over 230 pounds should choose a mattress thicker than 12 inches.
We created an easy recommendation tool called Mattress Match that provides size and thickness suggestions based on your body characteristics and comfort needs. This takes the guesswork out of deciding which models to consider.
Key Takeaways on What Size Mattress To Get
Choosing the right mattress size is key to a good night’s sleep, and understanding your specific needs can make all the difference. Here are some essential guidelines to help you make the best choice for your comfort and space.
- Ideal for Single Sleepers: Twin-size or Twin XL mattresses are perfect for children, teenagers, or single adults. They fit well in smaller spaces and provide ample room for one.
- Couples’ Comfort: Queen or King-size mattresses are the most common size and are recommended for couples. Queens balance comfort with space efficiency, while Kings offer extensive personal space for each individual.
- Tailored for Tall Individuals: Those over 6 feet tall should consider Twin XL, Queen, King, or California King beds for the extra length they provide, ensuring a comfortable sleep.
- Consider Your Room Size: The dimensions of your bedroom are crucial. Choose a mattress that allows for a comfortable fit in your room, space for easy movement, and other furniture.
- Personal Preference and Lifestyle: Space preference varies; some enjoy spreading out on a larger mattress, while others prefer a snugger fit. A family bed size might be the best choice for families that co-sleep.
- Bunk beds: This space saving solutions typically requires two twin-size mattresses, although some come with one twin and one Full mattress frame.
Remember, selecting the right mattress size is not just about measurements; it’s about what feels right for you.
My family and I understand this and are here to guide you through the process. Whether you shop our best value mattresses online or visit us in Beloit, WI, or Rockford, IL, we’re dedicated to helping you find that perfect mattress, your sleep is more comfortable and as restful as possible.
Got More Questions?
Here’s the top FAQ we’re asked to help you further in selecting the mattress size that’s just right for you:
Can a king size mattress fit in any bedroom?
Not necessarily. It’s important to measure your room to ensure a king mattress fits comfortably along with other furniture.
Is a queen mattress suitable for couples?
Yes, a queen mattress is often ideal for couples, offering a balance of space and coziness. If you’re outfitting a camper or mobile space, an RV queen mattress offers the same comfort in a more compact size. For even more personalized comfort, especially if you and your partner have different sleep preferences, a split queen mattress can be a great option.
Should I choose a larger mattress for better sleep?
Larger mattresses can offer more comfort, especially for couples or restless sleepers, but the best size depends on individual needs and room dimensions.
What are the standard mattress sizes available?
This question addresses the various dimensions of mattresses available in the market. Standard sizes include Twin, Twin XL, Full (or Double), Queen, King, and California King. Each size caters to different space requirements and sleeping needs.
How do I choose the right mattress size for my room?
To size a mattress to your room, a general rule is to leave at least two feet of space on three sides of the bed. Take measurements of your room and subtract the bed length from your room length to see what space is left. Do the same for the width.
Having 24″ – 36″ of space ensures there is enough space around the bed for movement and additional furniture.
Does mattress size affect sleep quality?
The size of the mattress can significantly impact sleep quality, especially for couples or individuals who move a lot in their sleep. Larger mattresses offer more space and can reduce disturbances caused by movement.
What mattress size is best for couples?
Couples generally prefer a Queen or King-size mattress as these sizes offer ample space for two people. The choice may depend on personal space preferences, the size of the bedroom, and budget considerations.
Are mattress sizes the same worldwide?
Mattress sizes can vary by country. The standard dimensions for mattress sizes in the United States might differ from those in Europe or Asia. It’s important for buyers to check specific measurements when purchasing mattresses, especially from international sources.
European Mattress Sizes
- Single: 36″ W x 78″ L
- Single Extra Long: 36″ W x 82″ L
- Small Double: 48″ W x 78″ L
- Double: 54″ W x 78″ L
- King: 63″ W x 79″ L
- Grand King: 79″ W x 79″ L
Asia Mattress Sizes
- Single: 36″ W x 75″ L
- Super Single: 42″ W x 75″ L
- Queen: 60″ W x 75″ L
- King: 72″ W x 75″ L
Are you just researching right now?
Check out our free Mattress Buying Guide and How to Experience The Best Sleep Guide.
