Mattress Size Guide: What Bed Size and Mattress Dimensions Do You Need?
Besides how your mattress looks and feels, there’s another important element to consider that impacts your sleep: mattress size. The right-sized mattress is a major part of how well you sleep. After all, you’ve probably experienced the misfortune of a mattress that was too small for you. For instance, maybe you visited your folks during the holidays and had to make do with your childhood twin mattress despite your feet hanging off the edge.
Choosing the right mattress size from all the options out there might be intimidating, especially because many sizes have sub-categories. Want to make sure that you pick the right mattress size for your space? Read our mattress size guide below to learn more about making the right decision for you and your bedroom.
Explore our mattress size guide to discover the different bed sizes on the market and find one that fits you and your space. At Layla Sleep, we carry all six traditional mattress sizes so you can get your best sleep yet.
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Besides a crib mattress, which is designed for infants or toddlers, a twin mattress is the smallest of all available mattresses at 38 inches wide and 75 inches long. In general, twin mattresses are perfect for single sleepers like children and adolescents who don’t need a very large mattress.
Despite its compact size, twin mattresses also cater to adults seeking a space-efficient sleeping option. Commonly found on day beds or in dorm rooms, studio apartments, or guest rooms, twin mattresses offer versatility in compact living spaces and provide a comfortable solution for various sleeping needs.
Best for: Kids, teens, or single sleepers who do not need much space
Room Size: The ideal room size is 7’ x 9’, perfect for small bedrooms, guest bedrooms, and dorm rooms. However, when adding furniture like a desk, nightstand, and dresser, an 8’ x 10’ room is recommended.
As you might imagine, a twin XL mattress is slightly bigger than a standard twin mattress — 5 inches to be exact — measuring 38 inches wide by 80 inches long. If you’re a taller adult, a twin XL will typically be more comfortable than a twin-sized mattress. And, you can actually combine two twin XL mattresses on a king-sized bed frame – which is a great set-up to use if you have a partner who prefers a softer or firmer mattress compared to you.
Twin XL mattresses are popular choices in college dorms, studio apartments, and guest rooms due to their compact size and enhanced comfort for single sleepers. Their extended length ensures a more spacious sleeping surface than standard twin mattresses, accommodating adults and taller adolescents alike. Whether used individually or paired for shared sleeping arrangements, twin XL mattresses offer flexibility and comfort in various living and sleeping environments.
Best for: Kids, teens, or single sleepers who do not need much space
Room Size: The ideal room size is 7’ x 9’, perfect for small bedrooms, guest bedrooms, and dorm rooms. However, when adding furniture like a desk, nightstand, and dresser, an 8’ x 10’ room is recommended.
A full-sized mattress, sometimes also called a “standard double,” measures 54 inches wide by 75 inches long. It is a great option for adults who want a roomier feel than a twin XL. You can sleep in a double bed with a partner, but hopefully, you like to snuggle because it will be a bit cramped for two.
Beyond individual comfort, a full-sized mattress is also well-suited for households with pets or children who occasionally share the bed. The extra width allows for more flexibility and comfort when sharing the bed with furry friends or little ones who may join in during the night.
In bedrooms where space permits, full mattresses are versatile options for guest rooms or smaller primary bedrooms, balancing comfort with practicality in different living environments.
Best for: Single sleepers, teenagers, and couples sleeping in a smaller bedroom
Room Size: A minimum room size of 9’ x 10’, or 10’ x 12’ when adding furniture
Queen mattresses are the most popular option among sleepers of all shapes and sizes, with dimensions of a queen bed measuring 60 inches wide by 80 inches long. The reason why queens are so popular is because they offer enough room for single sleepers to splay out if they want, but they also have plenty of room for a couple.
It’s important to note that because the queen mattress is larger, you’ll need to consider the size of your bedroom. It might be worth the trouble to measure the dimensions of your bedroom to ensure you get a mattress that actually fits in it!
Best for: Couples, single sleepers who want space, or those sharing a bed with pets or children.
Room Size: A queen bed should be placed in a room that’s at least 10’ x 10’ or 10’ x 12’ when adding additional furniture pieces.
A king mattress is big and luxurious – so make sure that your room is at least 12 x 12 to ensure a comfortable fit. When it comes to a king vs. queen bed size, a king mattress is 16 inches wider, measuring 76 inches wide by 80 inches long.
The generous size of a king mattress offers a luxurious sleep experience, accommodating couples who share their bed with pets or children. This size ensures that everyone has plenty of space to sleep comfortably without feeling cramped.
Best for: Couples, single sleepers wanting more space, or sleepers sharing a bed with children or pets
Room Size: At least 12’ by 12’ or larger if bigger bedroom furniture is being used
For couples or even single sleepers who require acres of space for their slumber, a California king is the answer, clocking in at 72 inches wide by 84 inches long.
This size is ideal for taller individuals or couples who require more legroom or for couples who prefer ample space to move freely during sleep. The California king mattress provides a luxurious sleep experience, accommodating those who appreciate the expansive dimensions for a more comfortable night’s rest.
Still want more space? Don’t worry; there are other types of king-size beds you can try beyond the California king, including the Texas, Wyoming, and Alaskan king mattresses.
Best for: Taller couples, single sleepers, or those sharing a bed with pets or children
Room Size: 12’ x 12’ or larger, especially when adding additional furniture pieces
Traditional mattress sizes include twin, twin XL, full, queen, king, and California king. But what if you need a different bed size to accommodate the shape or size of your bedroom? Fortunately, there are several non-traditional mattress sizes you can find from specialty retailers to find your match. Explore some specialty-size mattresses below:
- Crib/Toddler Mattress Dimensions: The standard dimensions for a crib or toddler mattress is 28” x 52”, offering plenty of space for your little one to toss and turn before upgrading to a twin.
- Full XL Mattress Dimensions: Measuring 53” x 80”, the full XL mattress is 5 inches longer than the standard full while sharing the same width. It is perfect for taller sleepers who might not have enough space for a queen.
- Olympic Queen Mattress Dimensions: At 66” x 80”, the Olympic queen mattress offers additional room for single sleepers to spread out comfortably or for couples who prefer a bit more space to move during the night. It’s a popular choice for those who find standard queen mattresses slightly restrictive in width but still want to maintain a manageable bed size in their bedroom.
- RV Queen Mattress Dimensions: Campers can outfit their RVs with an RV queen mattress, which boasts dimensions of 60” x 75”.
- RV King Mattress Dimensions: For campers looking for slightly more space, the RV king mattress measures 72” x 80”.
- Texas King Mattress Dimensions: As they say, everything’s bigger in Texas, and so are their mattresses. The Texas King measures 80” x 98”, making it the longest bed on the market.
- Wyoming King Mattress Dimensions: At 84” x 84”, the Wyoming King is a perfect square. It might not be as long as a Texas King, but it makes up for it in width, offering an additional 4 inches.
- Alaskan King Mattress Dimensions: To complete our list of mattress sizes, we have the Alaskan King at 144” x 84”. Whether you have an extremely large bedroom or a sprawling family that cozies up for a movie night in bed, the Alaskan King might be your best bet.
- Custom Mattresses: If you find none of the traditional or non-traditional mattress sizes fit your space or sleeping preferences, you can find custom mattress makers who can accommodate specific design choices.
Budget is another factor you might want to consider. Typically, larger mattresses cost more than smaller mattresses due to the need for more materials. With that said, make sure you still choose a mattress that’s comfortable, made with quality materials, and fits your body size.
Why? Because if you go with the cheapest option available, that mattress likely won’t have the lifespan of a higher-quality one. As a result, you may end up needing a replacement sooner, and any money you would have saved upfront at the cheap price is completely moot.
Also, remember that if you change your mattress size, you’ll likely need a new box spring or foundation. Factor this into the costs associated with buying a new bed.
Budget is another factor you might want to consider. Typically, larger mattresses cost more than smaller mattresses due to the need for more materials. With that said, make sure you still choose a mattress that’s comfortable, made with quality materials, and fits your body size.
Why? Because if you go with the cheapest option available, that mattress likely won’t have the lifespan of a higher-quality one. As a result, you may end up needing a replacement sooner, and any money you would have saved upfront at the cheap price is completely moot.
Also, remember that if you change your mattress size, you’ll likely need a new box spring or foundation. Factor this into the costs associated with buying a new bed.
In most cases, you’re not going to want a California king mattress if you live in a tiny studio that’s 300 square feet. Measuring the size of your room will ensure you have plenty of space for other bedroom necessities, such as nightstands and dressers. As a general rule of thumb, your bed should take up about ⅓ of your bedroom space. For example, if your bedroom is 10ft. x 9ft. (90 sq. ft.), a queen-sized bed will fit comfortably, as a standard queen bed is roughly 33 sq. ft. (5 ft. x 6.66 ft.), which is close to a third of this bedroom size.
If you’re tall — like over 6 feet — you’ve probably noticed that standard mattresses can feel a bit cramped. That’s where sizes like twin XL, full XL, queen, or king come in handy. They offer that extra length you need to stretch out comfortably and get a good night’s sleep without your feet banging the footboard or hanging off the edge.
Matching your mattress size to your body size ensures you have enough space to move around without feeling restricted. For couples, a queen or king mattress can make a big difference, especially if one or both of you are taller or tend to toss and turn at night.
Ever noticed how your sleeping style can affect how comfy you feel in bed? If you’re someone who tosses and turns a lot during the night, a bigger mattress might be your best friend. It gives you more room to move around without bumping into the edges or disturbing your sleep partner.
Your sleeping position also plays a crucial role in the bed size you choose. Side sleepers may benefit from smaller mattresses, such as a full, as sleeping on your side takes up less space. On the other hand, if you’re sleeping on your stomach or sleeping on your back, you may require a larger mattress, especially if you sleep in positions like the starfish, where they sprawl across the bed.
So, when you’re picking out your mattress, consider how you sleep. It’s not just about the size of your room — it’s about making sure you have the space you need to sleep soundly, no matter how you move.
Choosing the perfect bed size boils down to understanding your personal needs and the dimensions of your bedroom. Whether you’re furnishing a solo sleep space or accommodating a partner and maybe even pets or children, selecting the right mattress size ensures comfort and adequate sleep.
Layla offers a comprehensive range of mattress sizes to suit every lifestyle and preference. Our commitment to quality and comfort, paired with options like our 120-night trial, ensures that you can confidently find the perfect mattress size without the hassle, guaranteeing a restful night’s sleep tailored to your specific needs.
At Layla, finding the right mattress size isn’t just about bed dimensions; it’s about enhancing your sleep experience with materials and designs that prioritize comfort, support, and durability. Shop our collection today.