Design Standards

A Guide to Mattress Sizes and Dimensions Charts

A Guide to Mattress Sizes and Dimensions Charts

Understanding mattress sizes is crucial for ensuring comfort, aesthetics, and practicality in your bedroom, as well as for making informed purchasing decisions. It’s an essential consideration when selecting a mattress that suits your needs and your living space.  This Guide to Mattress Sizes will help you determine what mattress will fit your space and lifestyle needs.  Whatever style and size of mattress you choose, you can always have a custom bed to fit it.

In this article, we will talk about


Standard Mattress Sizes

Standard Mattress sizes include Crib, Twin, Full, Queen, and King.

Standard mattress sizes encompass a range of dimensions tailored to accommodate diverse sleep preferences and room sizes. The most common sizes include twin (38×75 inches), full (54×75 inches), queen (60×80 inches), and king (76×80 inches). Twin mattresses are ideal for children’s rooms or compact spaces, while full mattresses offer more room for single sleepers. Queen mattresses are a popular choice for couples and average-sized bedrooms, striking a balance between space and practicality, while king mattresses provide abundant room for couples and those who desire spacious slumber. These standardized sizes simplify mattress shopping and bedding choices for individual needs and room layouts.

Standard Mattress Sizes and Dimensions, Crib, Twin, Full, Queen, king

King Mattress Size

76″ x 80″

Standard King Mattress Size, Eastern King Mattress

A standard king mattress, also known as an Eastern king, is a generous bedding choice measuring 76 inches in width and 80 inches in length, offering an expansive sleeping surface for couples and individuals who prioritize ample space for a restful night’s sleep. This size provides each person as much room as a twin bed would, ensuring minimal disturbances from a partner’s movement during the night. It’s a popular choice for master bedrooms with sufficient space, and its dimensions make it a versatile option for both single and dual sleepers, accommodating various sleep preferences and body sizes.

 Queen Mattress Size

60″ x 80″

Queen Mattress Size

A queen mattress, measuring 60 inches in width and 80 inches in length, strikes a harmonious balance between space and versatility, making it a popular choice in the world of bedding. Well-suited for couples or individuals seeking extra room to sprawl comfortably, it offers more width than a full mattress while remaining a practical fit for many bedroom sizes. Its adaptable dimensions cater to a wide range of sleep preferences, providing ample space for restful slumber without overwhelming the room, making the queen mattress a favored option for those seeking a spacious and accommodating sleeping surface.

Full Mattress Size

54″ x 75″

Full Mattress Size, Double Mattress Size, 54" x 75"

A full mattress, often referred to as a double mattress, measures 54 inches in width and 75 inches in length, offering a versatile bedding solution that strikes a balance between space and room suitability. It is an ideal choice for solo sleepers who desire more room to stretch out or for couples who prefer to snuggle up closely. The full mattress provides more width than a twin, granting comfort for individual sleepers while still fitting well in smaller bedrooms or guest rooms. Its adaptable dimensions make it a practical choice for those with modest space constraints, delivering a comfortable and accommodating sleeping surface for various sleep preferences.

Twin Mattress Size

38″ x 75″

Twin Mattress size, 38" x 75"A twin mattress, measuring 38 inches in width and 75 inches in length, is a compact and space-efficient bedding option, often chosen for children’s rooms, guest bedrooms, or in bunk beds. Its modest size is ideal for smaller living spaces and provides ample room for a single sleeper to rest comfortably. The twin mattress is a cost-effective choice that suits the needs of children and young adults, while its manageable dimensions make it a practical solution for those with limited space. It offers a cozy and space-saving sleeping surface for a restful night’s sleep.

Crib Mattress Size

27 1/4″ x 51 5/8″ 

(same as a toddler mattress)

Crib Mattress Size, 27 1/4" x 51 5/8"

A crib mattress is a specialized bedding product designed for infants and toddlers, typically measuring 27 1/4″ inches in width and 51 5/8″ inches long to fit snugly inside a standard crib. Crib mattresses do not exceed 6″ in height to ensure babies cannot climb out of their crib as they grow.  Safety and comfort are paramount in crib mattress design, with features like firm support to reduce the risk of Sudden Infant Death Syndrome (SIDS), waterproof covers for easy cleaning, and hypoallergenic materials to protect sensitive infant skin. Crib mattresses provide a secure and comfortable sleep environment for babies, ensuring they get the quality rest they need during their formative years while adhering to strict safety standards to promote a safe sleeping space for infants.  The standard toddler mattress size is the same as a crib mattress: 27 ¼ inches x 51 5/8 inches. Many cribs, often called convertible cribs, turn into toddler beds using the same mattress. Crib mattresses are designed to be slightly smaller than standard crib dimensions. When the mattress is pushed tight to one side, ensure that there is no more than a 1? gap between the mattress and the crib wall; the tighter, the better.

XL Mattress Sizes

XL mattress sizes, Twin XL, Full XL, Olympic Queen, and California King

XL mattress sizes offer unique dimensions tailored to accommodate specific needs. The Twin XL, Full XL, and California King measure an extra 4-5 inches in length, which is an elongated version of the standard mattress.  This makes them an excellent choice for taller individuals or those who require extra legroom. On the other hand, the Olympic Queen, sized 66 inches in width and 80 inches in length, falls between a standard Queen and King mattress, offering a bit more space for couples or those who desire a roomier sleep surface without the larger footprint of a King.   For those who have larger master bedrooms and want that extra sleeping surface, a California King may be just the right size.  These XL sizes provide versatile options for various sleep preferences and room layouts, ensuring a comfortable and accommodating slumber experience.

XL Mattress Sizes, XL Twin, XL Full, Olympic Queen, and California King

Twin XL Mattress Size

38″ x 80″

Twin XL Mattress Size, 38" x 80" The Twin XL mattress, whose dimensions are 38 inches in width and 80 inches in length, is a versatile and elongated bedding option over the standard twin size.  It caters to those seeking extra legroom or a more spacious sleep surface than a standard Twin. It is particularly popular among students in dorm rooms and individuals with limited bedroom space, providing ample length for taller sleepers and accommodating various sleep preferences.

Full XL Mattress Size

 54″ x 80″

Full XL Mattress Size, 54" x 80"

The Full XL mattress, measuring 54 inches in width and 80 inches in length, combines the width of a Full mattress with additional length, making it an ideal choice for taller individuals or those who appreciate extra legroom. It balances space and compactness, providing more space than a standard Full while still fitting well in smaller bedrooms and guest rooms. The Full XL mattress is favored for its adaptability, accommodating various sleep preferences and offering a comfortable sleep surface, making it suitable for both single sleepers seeking extra room to sprawl and couples who prefer a cozier sleep space without the added width of a Queen.

 Olympic Queen Mattress Size

66″ x 80″

Olympic Queen Mattress Size, 66" x 80"

The Olympic Queen mattress, measuring 66 inches in width and 80 inches in length, offers a unique and versatile bedding option, falling in between a standard Queen and King size. It provides extra width compared to a Queen mattress while maintaining the same length, making it an excellent choice for couples or individuals who desire a more spacious sleep surface without the oversized dimensions of a King. The Olympic Queen combines comfort and practicality.

California King Mattress Size

72″ x 84″

California King Mattress Size, 72" x 84"

The California King mattress, with its dimensions of 72 inches in width and 84 inches in length, is a spacious and luxurious bedding option renowned for its elongated design. It provides abundant space for couples or individuals to prioritize roominess in their sleeping quarters. The California King’s extended length caters to taller individuals, ensuring comfortable legroom, while the ample width offers a peaceful and disturbance-free night’s sleep, even when sharing the bed. Popular in larger master bedrooms, this mattress size combines opulence with practicality.

Split Mattress Sizes and Options

A split mattress comes in various sizes, such as Queen and king, and offers several advantages over a standard mattress:

  1. Customized Comfort: One of the most significant benefits is that a split mattress consists of two separate twin-style mattresses that can be adjusted independently. This allows each partner to have their preferred level of firmness or softness, making it an excellent choice for couples with different sleep preferences.
  2. Reduced Motion Transfer: With two separate mattresses, there is minimal to no motion transfer between the two sides. This means that if one partner moves or gets in and out of bed, it is less likely to disturb the other’s sleep, leading to a more restful night for both.
  3. Adjustable Beds: Split mattresses are often used with adjustable bed frames, which can raise the head or foot of each mattress independently. This is beneficial for people with specific health issues, such as acid reflux or snoring, or for those who enjoy reading or watching TV in bed.
  4. Easier Handling: Twin mattresses are more manageable in terms of transportation and maneuvering than a single large mattress, making them easier to set up and move if needed.  This is especially handy if you must maneuver a mattress around a tight corner, such as a staircase, to get into a bedroom.
  5. Versatility: In addition to being used as two separate beds, a split mattress can also be combined with a topper to create a standard bed if desired, providing flexibility in how the bed is used.

Overall, a split mattress is an excellent choice for couples who value individualized comfort and the flexibility to tailor their sleep experience to their liking while also reducing potential disruptions during the night.

Split Style Mattress Sizes, Split California King, Split King, Split Queen

Split California King Mattress Sizes

Total Mattress Size 72″ x 84″

Split Size 36″ x 84″

Split California King Mattress Sizes, Total Mattress Size 72" x 84" - Split Size 36" x 84"

Split King Mattress Sizes

Total Mattress Size 76″ x 80″

Split Size 38″ x 80″

Split King Mattress Sizes Total Mattress Size, 76" x 80" - Split Size 38" x 80"

Split Queen Mattress Sizes

Total Mattress Size 60″ x 80″

Split Size 30″ x 80″

Split Queen Mattress Sizes, Total Mattress Size 60" x 80" - Split Size 30" x 80"

Non-Standard King Mattress Sizes

Non-standard King Mattress Sizes include Supper King, Wyoming King, Texas King, and Alaskan King.

Non-standard king-size mattresses, like Wyoming King, offer unique dimensions tailored to accommodate specific needs. These Mattresses offer grandiose options in both width and length. They are suitable for those who value an extra-large and opulent bedding experience. These non-standard king sizes provide versatile alternatives to the traditional King, catering to various preferences, whether it’s customized comfort or the desire for a truly spacious and luxurious slumber.  They are sometimes called family mattresses as they are large enough to sleep a whole family on one mattress.

Non-Standard King Mattress Sizes, Super King, Wyoming King, Texas King, and Alaskan King

Super King Mattresses

72″ x 78″

A super king mattress is a spacious and luxurious bedding option, typically measuring 72 inches in width and 78 inches in length, making it one of the largest mattress sizes available. Designed for those prioritizing ample sleeping space and comfort, it provides plenty of room for couples or individuals to stretch out and sleep soundly. Its generous dimensions offer a peaceful night’s rest, reducing the likelihood of disturbances from movement or lack of space ensuring a restful and rejuvenating slumber.

Supper King Mattress size, 72" x 78"

Wyoming King Mattress Size

84″ x 84″

Wyoming King Mattress Size, 84" x 84"

The Wyoming King mattress is a non-standard size that was developed to accommodate a specific demand for exceptionally spacious bedding. It is believed to have originated in the state of Wyoming, hence the name. While there is no documented historical account pinpointing its exact origin, it likely evolved in response to the Western U.S. culture, where larger-than-average mattress sizes are sometimes preferred. This size, measuring 84 inches in both width and length, offers an abundance of sleeping space and is particularly well-suited for people who value a roomy and luxurious bed, such as those with large bedrooms or wanting to create a communal and social sleeping environment. While not as widely available as standard mattress sizes, the Wyoming King fills a niche for those who desire an exceptionally spacious and opulent bedding solution.

Texas King Mattress Size

98″ x 80″

Texas King Mattress Size, 98" x 80"

The Texas King mattress, like the Wyoming King, is not a standard mattress size and is believed to have emerged in response to the desire for exceptionally spacious bedding. It’s named after the state of Texas, which is known for its “everything is bigger in Texas” ethos. The exact origin of the Texas King mattress is not well-documented, and it may have evolved organically to cater to the preferences of individuals and families who appreciate larger sleep surfaces. This size typically measures 80 inches in width and 98 inches in length, making it one of the largest mattress sizes available. The Texas King provides ample room for couples, families, or anyone who values a truly roomy and luxurious sleeping experience. It’s a niche size, not as common as standard sizes, but it caters to those who want an expansive and opulent bed that can easily accommodate multiple sleepers or provide a grand sleeping area.

Alaskan King Mattress Size

108″ x 108″

Alaskan King Mattress Size, 108" x 108"

The Alaskan King mattress, like the Texas King and Wyoming King, is a non-standard mattress size that is often associated with the desire for an exceptionally spacious sleeping surface. Its origins are not well-documented, but it is named after the state of Alaska, known for its vast landscapes and a sense of abundance. The Alaskan King is one of the largest mattress sizes available, measuring 108 inches in width and 108 inches in length, making it even larger than a standard King or California King. This mattress size is designed for those who prioritize an extremely roomy and luxurious sleeping experience, whether they have a large bedroom or simply prefer a grand and communal sleeping space. While not as commonly found as standard mattress sizes, the Alaskan King meets the needs of those who value extraordinary sleeping space and comfort.

What are Standard Mattress Thicknesses

Standard mattress thicknesses can vary, but the most common ones typically fall in the range of 8 to 14 inches. Here’s a breakdown of some common mattress thicknesses and their characteristics:

  • Extra Thick, Deep, or Tall Mattresses are greater than 16″ in thickness
  • Thick, Deep, or Tall Mattresses are between 12″ and 16″ in thickness
  • Standard Mattresses are between 8″ and 12″ in thickness
  • Slim Mattresses are between 5″ and 8″ in thickness
  • Low Profile Mattresses are between 2″ and 5″ in thickness

Mattresses come in five standard thickness ranges as shown in this diagram

The most common mattress thickness is in the 8 to 10-inch range. These mattresses provide a comfortable night’s sleep for most people and are compatible with various bed frames and bedding accessories. However, the right mattress thickness can vary depending on an individual’s body weight, sleeping position, and personal preferences. It’s important to choose a mattress thickness that suits your specific needs for a restful night’s sleep.

Standard Box Spring Mattress

The average box spring mattress ranges between 8 to 9 inches.

Box springs, or foundations, typically come in standard thicknesses of 8 to 9 inches. However, it’s essential to note that the thickness of a box spring can vary depending on the manufacturer and the specific model. The standard thickness is designed to provide adequate support and elevation for a mattress. Box springs are used to absorb shock, distribute weight evenly, and extend the lifespan of the mattress. Some variations may include low-profile box springs, which are typically around 4 to 5 inches thick, offering a lower bed height. The choice of box spring thickness can depend on personal preference, the height of the bed frame, and the overall aesthetics of the bed.

How to Select a Mattress

Selecting the right mattress is crucial for a good night’s sleep and overall well-being. Here are some tips and things to consider when choosing a mattress:

  1. Comfort Preference: Everyone has different comfort preferences. Try out different mattress types (innerspring, memory foam, latex, hybrid) to see which one feels the most comfortable to you. Consider factors like firmness or softness.
  2. Support: Look for a mattress that provides proper support for your body. Your spine should maintain a neutral alignment while you sleep.
  3. Size: Choose a mattress size that suits your needs. Twin, Full, Queen, and King are common sizes, but there are also non-standard sizes available.
  4. Durability: Consider the longevity of the mattress. High-quality materials and construction can make a mattress last longer.
  5. Motion Isolation: If you sleep with a partner, consider a mattress with good motion isolation to prevent disturbances when one person moves.
  6. Allergies: If you have allergies, consider a hypoallergenic mattress that repels allergens.
  7. Edge Support: Quality edge support can make it easier to get in and out of bed and maximize the usable surface area.
  8. Temperature Regulation: Some mattresses are designed to sleep cooler, which can be important if you tend to sleep hot.
  9. Trial Period: Many mattress companies offer trial periods that allow you to test the mattress at home. This is especially helpful for finding the right fit.
  10. Budget: Determine how much you’re willing to spend. Keep in mind that a good mattress is an investment in your health and well-being.
  11. Warranty: Check the warranty terms, which can vary from a few years to a few decades. A longer warranty period often indicates the manufacturer’s confidence in the product.
  12. Read Reviews: Look for reviews and ratings from other customers to understand the mattress’s performance.
  13. Consult with a Professional: If you have specific health concerns or back problems, consult with a healthcare professional or a sleep specialist for personalized recommendations.

Remember that the best mattress for you depends on your unique preferences and needs. Take your time to research, test out mattresses in person, and, if possible, make use of trial periods to ensure you’re making the right choice for a good night’s sleep.

How Often Should You Replace Your Mattress?

The lifespan of a mattress can vary depending on the type and quality of the mattress, as well as how well it’s cared for and how often it’s used. In general, here are some guidelines for when you might consider replacing your mattress:

  1. Every 7-10 Years: Most mattresses, regardless of type, tend to have a lifespan of around 7 to 10 years. This is a general guideline, and some mattresses may need replacement sooner or later.
  2. Visible Wear and Tear: If you notice visible signs of wear and tear, such as sagging, lumps, or indentations, it’s a good indicator that your mattress is no longer providing the support and comfort it should.
  3. Change in Sleep Comfort: If you’re no longer getting a restful night’s sleep, or you wake up with aches, pains, or discomfort, it might be time for a new mattress.
  4. Allergies or Health Issues: Over time, mattresses can accumulate allergens and dust mites. If you develop allergies or other health issues that could be related to your mattress, it might be a good idea to replace it.
  5. Weight Changes: Significant changes in body weight can affect the durability and comfort of a mattress. You might need a new mattress if your weight changes significantly.
  6. Lifestyle Changes: Major lifestyle changes, such as moving in with a partner or upgrading your bedroom, can also be a good time to consider a new mattress.
  7. Manufacturer’s Recommendations: Check the manufacturer’s recommendations and warranty information. Some mattresses come with warranties that specify when it’s time for a replacement.

Ultimately, the decision to replace a mattress is a personal one and depends on your comfort and sleep quality. If your mattress is still in good condition and you’re sleeping comfortably, there may be no need to replace it. However, if you’re experiencing discomfort or your mattress shows signs of wear, it’s a good idea to start considering a replacement. A quality mattress is an investment in your health and well-being, so it’s essential to ensure that it’s doing its job properly.

I’m the owner of Benham Design Concepts, a mixed media art studio where I design and build custom furniture and other works of art using wood, glass, stone, and various metals.
In this blog, I talk about the art I create, my journey, and the things I learn along the way.