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Mattress sizes guide

Mattress Sizes & Bed Dimensions – Step-By-Step Guide 2024

Choosing the right mattress size is crucial for a comfortable and functional bedroom. Here’s a guide to common mattress sizes.

It’s important to consider your bed size, the number of sleepers, and individual preferences when choosing a mattress size. Couples often prefer Queen or King sizes for more space, while individuals with smaller bedrooms might opt for Twin or Full sizes. 

Measure your room and consider other furniture to ensure the chosen mattress fits comfortably.

Standard Mattress Sizes

Most mattresses come in the following sizes:

Twin Mattress Dimension

A twin mattress dimension is 38 inches wide and 75 inches long, making it the smallest standard mattress size. It’s commonly used for children or in rooms with limited space. The compact dimensions also make it suitable for bunk beds or daybeds. 

Twin mattresses are space-efficient but may be less accommodating for taller individuals. If extra length is needed, there’s a Twin XL option, measuring 80 inches in length.

Best Twin Size Mattresses

  • Linenspa Memory Foam Hybrid Mattress – Best for Budget-Conscious Sleepers 
  • Saatva – Best Mattress for Luxury and Support
  • DreamCloud – Best Mattress for Back Sleepers
  • Leesa – Best Mattress for Stomach Sleepers

Twin XL Mattress Dimension (Extra Long)

A Twin XL mattress measures 38 inches in width and 80 inches in length. The “XL” stands for “Extra Long,” providing an additional 5 inches in length compared to a standard Twin mattress. 

This makes the Twin XL mattress an excellent choice for taller individuals or adults who prefer more legroom. Like the standard Twin, the XL is space-efficient, making it suitable for smaller bedrooms or shared spaces.

Best Twin XL Mattresses

  • Helix Midnight – Best Overall
  • Winkbed – Best Hybrid Mattress
  • Nectar – Best Memory Foam Mattress
  • Saatva – Best for Stomach Sleepers

Full Mattress Dimension (Double)

A Full mattress, also known as a Double mattress, measures 54 inches in width and 75 inches in length. It provides more width than a Twin, making it a suitable option for single adults who desire additional space or for teenagers transitioning from a smaller bed size. 

The Full size is also a practical choice for smaller bedrooms or guest rooms with larger mattresses. While it can accommodate a single sleeper comfortably, it may be a bit snug for couples who like more personal space.

Best Full Size Mattresses

  • Leesa Sapira Hybrid Mattress – Best Overall
  • Saatva – Best for Back Sleepers
  • Nectar – Best for Back and Stomach Sleepers
  • LUCID Gel Memory Foam Mattress – Best for Budget-Conscious Sleepers 

Queen Mattress Dimension

A Queen mattress dimension is 60 inches wide and 80 inches long, making it a popular choice for couples or individuals who appreciate extra space. With more width than a Full mattress, a Queen size bed dimension provides ample room for two people to sleep comfortably without sacrificing too much floor space in the bedroom.

It’s a versatile size that suits various sleeping preferences and bed sizes.

Best Queen Size Mattresses

  • Helix Midnight – Best Mattress Overall
  • Brooklyn Bedding Signature Hybrid – Best for Comfortable Sleepers
  • Nectar Mattress –  Best for Back and Stomach Sleepers
  • Saatva Classic – Best Luxury Mattress

RV Queen Mattress Dimensions

The RV queen mattress is designed specifically for recreational vehicles and campers. It measures 60 inches wide by 75 inches long, offering the same width as a standard queen mattress but with a shorter length to fit RV bedroom dimensions.

King Mattress Dimension

A King size mattress dimension measures 76 inches in width and 80 inches in length, making it one of the largest standard mattress sizes. This site provides ample space for couples, allowing each person as much room as a Twin mattress. 

The King size mattress is particularly suitable for larger master bedrooms, offering a luxurious and spacious sleep surface. 

It’s popular for couples who prefer extra space or families who may share the bed with children or pets. The King size mattress is available in the Standard and California King.

Best King Size Mattresses

  • Helix Midnight – Best Mattress Overall
  • WinkBed – Best Innerspring Mattress
  • Saatva – Best Mattress for Back Pain
  • Nectar – Best Memory Foam Mattress

California King

A California King mattress, often called a Cal King, is 72 inches in width and 84 inches in length, making it one of the largest standard mattress sizes. It’s a longer but slightly narrower alternative to the Standard King. 

The California King is popular for couples who want ample space and prioritize length over width. Overall, the California King mattress offers a comfortable and roomy sleep experience, especially for those needing extra length.

Best California King Size Mattresses

  • DreamCloud – Best Mattress Overall
  • Helix Midnight – Best Hybrid Mattress
  • WinkBed – Best Mattress for Back Pain
  • Nectar Classic – Best Memory Foam Mattress

RV King Mattress Dimensions

Similar to the RV queen mattress, the RV king mattress is designed for recreational vehicles and campers. It measures 72 inches wide by 80 inches long, offering the same dimensions as a standard king-size mattress but with a shorter length to accommodate RV bedroom sizes.

Texas King Mattress Dimensions

Everything is bigger in Texas, including mattress sizes. The Texas king mattress measures 80 inches wide by 98 inches long, providing ample space for larger bedrooms or families who love to snuggle up together.

Wyoming King Mattress Dimensions

The Wyoming king mattress is a perfect square mattress, measuring 84 inches wide by 84 inches long. It offers a contemporary and spacious sleeping surface for those who prefer a symmetrical bed size.

Alaskan King Mattress Dimensions

The Alaskan king mattress is the largest standard mattress size available, measuring a whopping 144 inches wide by 84 inches long. It is perfect for those with extra-large master bedrooms or families who enjoy movie nights in bed.

Other Mattress Sizes

These sizes can be more difficult to locate and may require purchasing a bespoke mattress from a manufacturer.

Olympic Queen Mattress

An Olympic Queen mattress is a non-standard size, wider than a standard Queen size bed dimension at 66 inches in width and 80 inches in length. It provides extra sleeping space, making it suitable for those wanting more room than a traditional Queen mattress. 

However, it’s essential to note that Olympic Queen mattresses may be less common, and finding compatible bedding might require extra effort. 

Full XL Bed Size

A Full XL bed size is a mattress that combines the width of a standard Full (54 inches) with the length of a Queen (80 inches). This site is designed to offer extra legroom, making it suitable for taller individuals who need more length without opting for a wider Queen mattress. 

It provides additional sleeping space compared to a standard Full but is narrower than a Queen bed dimension. 

Small Single Bed Size

A Small Single bed size is a compact mattress measuring 30 inches in width and 75 inches in length, designed for individual sleepers in situations with limited space. It’s commonly used in children’s rooms, bunk beds, or small bedrooms where floor space needs to be maximized.

Crib Size Bed 

A Crib-Size bed is a mattress designed for cribs, measuring 28 inches in width and 52 inches in length. It ensures a snug fit in the crib, meeting infant safety standards and providing a secure sleep environment.

Best Mattress Sizes for Single Sleepers

For single sleepers, the best mattress dimension depends on personal preferences and the available space. A Twin or Twin XL is suitable for smaller rooms or those with limited space, with the XL option catering to taller individuals. 

The Full/Double size offers more width than a Twin, providing additional room for movement without overwhelming the space. If a single sleeper desires more room to stretch out, a Queen-size mattress is a popular choice, offering ample width and length for individual comfort. 

Best Mattress Sizes for Couples

The ideal mattress dimension for couples often depends on their preferences and the space available in their bedroom. A queen-size mattress, measuring 60 inches in width and 80 inches in length, is popular for couples as it balances space and room size. This size allows for two-person comfortable sleep while fitting well in most bedrooms. 

However, for those with the space, a king-size mattress, measuring 76 inches in width and 80 inches in length, offers even more room, reducing the chances of disturbances caused by movement during the night. 

Best Mattress Sizes for Kids

Selecting the best mattress dimension for kids involves considering their age, growth, and available bedroom space. A twin mattress, measuring 38 inches in width and 75 inches in length, is a common and practical choice for younger children. It provides sufficient space for a single sleeper while compacting to fit in smaller rooms. 

As kids grow older or if you have the space, a twin XL (38 inches by 80 inches) or a full-size mattress (54 inches by 75 inches) may be suitable, offering additional length or width for increased comfort.

It’s important to account for the child’s preferences and potential growth when choosing the mattress size, ensuring a comfortable and supportive sleep environment that accommodates their changing needs.

Finding the Right Bedding for Your Mattress

Once you have chosen the perfect mattress size, it’s important to find bedding that fits properly and complements your sleep environment. Here are some tips for selecting the right bedding for your mattress:


Choose sheets that are designed specifically for your mattress size. Look for high-quality materials, such as cotton or linen, that provide comfort and breathability. Consider the thread count for a soft and luxurious feel.

Bedspreads and Comforters

Select bedspreads and comforters that match the dimensions of your mattress size. Consider the climate and your personal preferences for warmth and insulation. Look for materials that are hypoallergenic if you have allergies or sensitivities.


Choose pillows that provide the right level of support and comfort for your sleep position. Consider the size of the pillows to ensure they fit properly on your mattress.

Mattress Protectors

Invest in a mattress protector to prolong the life of your mattress and protect it from spills, stains, and allergens. Ensure that the protector is designed for your specific mattress size.

Additional Accessories

Consider other accessories such as mattress toppers, pillow covers, and extra blankets to enhance your sleeping experience. Look for products that are compatible with your mattress size and provide the desired level of comfort and support.

Factors to Consider When Choosing a Mattress Size

Here are the top 6 factors to consider when choosing a mattress size.

Room Size

Room size is pivotal in choosing a mattress, impacting aesthetics and functionality. A well-fitted mattress maintains visual balance, avoids overcrowding, and allows for seamless traffic flow in the bedroom. 

It ensures proper integration with additional furniture and complements the overall design, contributing to a harmonious and efficient sleeping space.

Sleeping Space Needs

Considering sleeping space needs is vital when choosing a mattress size, especially for couples or those sharing a bed. A larger mattress, like a queen or king, ensures ample space for each sleeper, minimizing disruptions caused by limited space or motion transfer. 

This factor is key for a comfortable and undisturbed night’s sleep, accommodating current and potential changes in sleeping arrangements.


Budget influences mattress size choice, with smaller options like twin or full being more cost-effective than larger ones. Striking between sleeping needs and financial constraints ensures a satisfactory and affordable mattress investment.

Bedroom Furniture

Choosing the right mattress size involves considering bedroom furniture needs for a harmonious layout. An appropriately sized mattress complements existing or planned furniture, ensuring optimal placement and functional aesthetics. This alignment facilitates easy movement and creates a cohesive, well-designed sleeping space.

Couples vs Solo Sleepers

When it comes to mattresses for couples, it’s often suggested that a queen or king-size mattress be used to ensure that both partners have enough space to sleep comfortably without interfering with each other’s sleep.

Body Size and Sleeping Position

Consider body size and sleeping positions when choosing a mattress size for optimal comfort and support. Larger individuals may prefer queen or king sizes, while side sleepers might benefit from a wider mattress. 

Aligning the size with personal needs ensures a comfortable night’s sleep and overall well-being.

Mattress Sizes FAQs

Here are some Frequently Asked Questions about mattress sizes:

What Are the Standard Mattress Sizes?

Standard sizes include Twin, XL, Full, Queen, King, and California King.

How Do I Choose the Right Mattress Size?

Consider room size, sleeping space needs, budget, furniture, body size, and position.

Is a Larger Mattress Always Better?

Not necessarily; the right size depends on individual needs, room size, and budget.

What Is the Difference Between Full and Queen-Size?

A Full is 54 x 75 inches, while a Queen bed dimension is larger at 60 x 80 inches.

Can I Use Twin XL Mattresses for a King Bed Size?

Yes, two Twin XLs are often used to create a split King mattress.

Can I Return a Mattress if It Doesn’t Fit My Needs?

Many retailers offer trial periods and return policies; check before purchasing.


In conclusion, selecting the right mattress size is a multifaceted decision considering various factors. This mattress size guide emphasizes the importance of aligning your choice with room dimensions, sleeping space needs, budget constraints, bedroom furniture, body size, and sleeping preferences. 

Whether it’s accommodating couples, fitting into a specific room layout, or catering to individual comfort, the guide underscores the significance of a well-informed decision. 

By balancing these factors, individuals can make a choice that enhances sleep quality and contributes to a harmonious and functional bedroom environment. Remembering to check return policies and trial periods ensures that the chosen mattress size aligns perfectly with practical and personal considerations.

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