Mattress Sizes and Dimensions: Which Bed Size Is Right For You?

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When it's time for a fresh mattress, you might be contemplating which bed dimensions are a suitable fit for you. With numerous factors to consider, such as who will be sharing the bed, the space in your bedroom, and any unique health or sleep concerns, it's not a one-size-fits-all decision. 

Mattress Size Guide

Don’t sweat it! It’s easy to get confused when there are so many sizes. We created this guide to go over the standard sizes and help you find the right mattress for you.

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Mattress Sizes & Dimensions Illustration
Twin Mattress Size


Dimensions: 38” x 75”

The smallest traditional bed size on the market, and the mattress you probably had as a kid. It’s compact and small, which means it’s great for children (who don’t need all that much sleeping space anyway) or for small apartments inhabited by single sleepers.

Twin XL

Dimensions: 38” x 80”

The staple of the college dorm room. Slightly longer than a twin, but still a lateral space-saver, these things work great for older teenagers up through single adults, and the extra leg length is usually enough for even the growth-spurtiest of young men (except for the future NBA stars, who are doomed for a life of custom everything).

Twin XL Mattress Size Illustration
Full Mattress Size Illustration


Dimensions: 53” x 75”

Also known as a double, the full is a great bed for a college kid with a little more space in their bedroom. It’s a smart choice for a guest room, and it can be enjoyed by couples who don’t mind cuddling through the night. Probably too small for the starfish-sleepers, however.


Dimensions: 60” x 80”

The most popular size of mattress on the market. The queen is a staple in master bedrooms all over the country. With a size of 60 by 80, there’s room for a happy couple and even a little space for furry friends who like to sleep between their humans.

Queen Mattress Size Illustration
King Mattress Size Dimension Illustration


Dimensions: 76” x 80”

For those who like their partner but also like their personal space, behold the king. A legendary mattress that has converted even the cuddliest of couples who claimed to be OK with sharing leg space, the king is the size of two twins pushed together. If can be set up that way, and it’s called a “split king.”

California King

Dimensions: 72” x 84”

The california king is the longest mattress on the market. At 84 inches long, there’s room for people taller than six feet, or even a dog or two sleeping at the foot of the bed. In a California king, both people should feel like they have all the space they need.

California King Mattress Size Dimensions Illustration

Which Bed Size Is Right For Me?

Picking a mattress isn't a one-size-fits-all scenario, so it's vital to assess your individual requirements. If you've experienced back discomfort or sleep troubles, it might be prudent to consider a mattress that offers a trial period to ensure your comfort.

Who Is Sleeping In The Bed

Will you be sharing the bed with a partner? Do your children or pets frequently join you during slumber? These are pivotal considerations. Typically, twin, twin XL, and full mattresses cater to solo sleepers. In contrast, queen, king, and California king beds are better suited for couples and families with occasional nocturnal visitors. 

If you'll be sharing the bed, contemplate how much personal space both you and your partner prefer. If you both appreciate stretching out during sleep, the additional room provided by a king or California king size will be welcome and help avoid unintentional collisions during the night. 

Size of the Room

The size of your bedroom is another crucial element. A larger mattress takes up more room, so you'll need to factor in other bedroom furniture. Make sure you have the space you need. 

To determine if a mattress size aligns with your room's space, consult a bed dimensions chart in square inches and square feet: 

  • Twin: 2,925 sq. in./20.3 sq. ft.
  • Twin XL: 3,120 sq. in./21.7 sq. ft.
  • Full: 4,050 sq. in./28.1 sq. ft.
  • Queen: 4,800 sq. in./33.3 sq. ft.
  • King: 6,080 sq. in./42.2 sq. ft.
  • California King: 6,048 sq. in./42 sq. ft.  

Body Size 

Your height and breadth should be considered when selecting a mattress. A typical twin mattress is 75 inches long, whereas a twin XL measures 80 inches in length. If you're taller than six feet two inches, a twin mattress might not suffice. In such cases, the XL, full, queen, or king options, all accommodating individuals up to 6 feet 7 inches, are preferable. 

For individuals taller than 7 feet or those who seek extra space on either side of their body, a full, queen, or king mattress offers the utmost comfort. 

Sleeping Position

Your preferred sleep style is important when narrowing down your mattress size options. If you tend to shift around a lot during the night, a broader mattress is a prudent choice.


Your budget also plays a role in selecting the right mattress size. Generally, larger sizes come at a higher cost. A king is more expensive than a queen, and a queen costs more than a full. 

Other factors that influence mattress prices encompass the materials used. Innerspring and all-foam mattresses tend to be budget-friendlier, while latex and hybrid beds employ more upscale materials, resulting in a higher price tag. How you acquire your mattress also matters; online retailers often offer cost savings compared to brick-and-mortar stores, which may mark up prices significantly. 

Less Common Mattress Sizes & Dimensions 

If standard mattress sizes don't quite meet your requirements, you have the option of exploring specialty sizes: 

  • Small Single (30 x 75 inches):
    Ideal for youngsters transitioning from cribs or for saving space in more compact rooms.

  • Super Single (48 x 84 inches):
    Longer than a full bed, making it suitable for taller teenagers
  • Full XL (53 x 80 inches):
    Offers extra length for taller individuals while preserving the width of a standard full.

  • RV Queen (60 x 75 inches):
    Slightly narrower than a standard queen, suitable for most RV bedrooms.

  • Olympic Queen (66 x 80 inches):
    Wider than a standard queen, providing additional room for couples with limited space.

  • RV King (72 x 80 inches):
    Perfect for RVs with smaller bedrooms.

  • Texas King (80 x 98 inches):
    A massive bed for those who enjoy sprawling, especially in Texas-sized bedrooms.

  • Wyoming King (84 x 84 inches):
    A square-shaped bed that fits comfortably in larger rooms.

  • Alaskan King (144 x 84 inches):
    A colossal mattress for extra-large master bedrooms or families that enjoy movie nights in bed. 

Choosing the Right Bedding For Your Mattress

Once you've secured the ideal mattress that ticks off all your prerequisites, the time has come to indulge yourself and your mattress with bed linens that harmonize seamlessly with the current style of your bedroom. 

But what exactly falls under the category of "bedding"? Broadly, bedding encompasses a range of fundamental accessories for your bed, including: 

  • Sheets
  • A Bedspread (commonly a comforter, quilt, or duvet)
  • Pillows
  • Pillow Covers
  • Extra Blankets
  • A Mattress Cover
  • A Bed Skirt

Occasionally, our impulsive urges lead us to hastily purchase the first duvet and sheet set we come across. However, you can ensure your new linens are the ideal match for your mattress by contemplating these practical insights and strategies for selecting the right bedding: 

  • Breathability - Take into account your local climate and prevailing weather conditions. If you inhabit a warmer region or tend to get exceptionally warm while asleep, consider opting for Hyperlite sheets, ensuring optimal breathability for a cool and comfortable night's rest.
  • Comfort - Although the notion of a higher thread count yielding softer and more opulent sheets is common, the recommended thread count for top-notch cotton sheets typically falls within the range of 200 to 400. 
  • Hypoallergenic Alternatives - You might be tempted to acquire the same all-natural 100% down duvet that your best friend fervently endorses. Nevertheless, if you have allergies or sensitivities to specific materials, a duvet filled with alternative stuffing, such as the Down-Alt Duvet comprised of 100% polyester, may be a more suitable choice. 
  • Quality Matters - Instead of impulsively clicking the "buy now" button and then regretting your decision later on, ponder meticulously over the quality of bedding that captures your interest. Just because a comforter complements the color of your bedroom walls doesn't automatically make it the perfect bedspread for you. Here are some aspects of potential bedding quality to assess before making the ultimate decision: 
  • Material - Whether you're on the hunt for sheets or a duvet, the quality of your bedding frequently hinges on the thread count of the material, with the sweet spot usually hovering around 250.
  • Filling - When searching for a duvet, look for options with more fill power, denoting greater down or alternative down. These options often boast enhanced longevity compared to those containing smaller clusters of fill.
  • Weight - Some duvets are notably weightier, making them more insulating than others. When procuring new bedding, take your prevailing climate into account to ensure your selection provides the ideal balance of warmth, preventing overheating or chills while you slumber.

Finding the perfect mattress requires time, patience, and a clear understanding of your preferences to discover the ideal one. Whether you ultimately opt for a full-size, king-size, or something in between, Realcozy is here to offer you a mattress that you'll cherish and one that will help you feel and sleep much better than you are today.

Explore our collection today to find your ideal match.