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Single Vs. Twin Bed Size Mattress: What Is The Difference?

By: Christina Davies
Updated on: April 05, 2024

Unlocking the mystery of mattress sizes can prove perplexing for many. Particularly confounding is the seemingly enigmatic realm of single vs. twin bed sizes. Though frequently recommended for solo sleepers, these two labels often lead to a tangled web of uncertainty. Here’s the revelation: single and twin beds are, in fact, synonymous. Both encompass a width of 38 inches and a length of 75 inches.

This article seeks to unravel the nuances between these two misunderstood mattress types. By clarifying the distinctions between twin xl mattress make, we aim to shed light on this commonly befuddling subject, assisting individuals in making well-informed decisions about their sleep haven. Join us as we unveil the truth behind the single vs. twin bed size debate.

Single Vs. Twin Bed Mattress Size Comparison

Single and twin-size mattresses are often used interchangeably as they share the same dimensions – 38 inches wide by 75 inches long. These beds are designed for single sleepers and are ideal for small spaces. For children’s rooms, they are a perfect choice, providing comfort and saving space. Both single beds and twin beds are cost-effective and efficient options.

Although the twin bed dimensions and single bed sizes are similar, the term ‘twin’ is more commonly used and recognized worldwide than ‘single.’ However, there is a subtle difference between them. A single bed is a complete mattress on its own, while a twin mattress is part of a pair and is not sold individually.

For example, you might find two twin beds fixed on a bunk bed or placed in a child’s room. While this practice was more common in the past, nowadays, most mattress manufacturers market their products as ‘twin’ beds.

Single Vs. Twin Bed Size Comparison Chart

Here’s the comparison chart for “Single Bed Vs. Twin Bed Size”:

ParametersSingle BedTwin Bed
Size39″ x 75″ (99 x 191 cm)38″ x 75″ (96.5 x 191 cm)
OccupancySingle personOften used in guest rooms for two
Ideal forCommon in kid’s rooms, hostels, etc.Children, Guest rooms

Small Single

A Small Single mattress is a type of mattress that is designed for one person and is smaller in size than a standard single mattress. Typically, a Small Single mattress measures around 30 inches (76 cm) in width and 75 inches (190 cm) in length.

It is commonly used for smaller spaces like children’s bedrooms, guest rooms, or bunk beds. Due to its compact size, it offers a comfortable sleeping surface for a twin or single bed or individual while saving space in a room. However, it’s essential to consider the dimensions and ensure it fits the bed frame or base properly.

Keep in mind that terminologies for mattress sizes can vary slightly in different regions, so it’s always a good idea to double-check the exact measurements before purchasing a Small Single mattress.

Twin XL

Twin XL is a specific size of bed commonly used in North America, especially in college dormitories and some residential settings. A Twin XL bed is larger than a standard twin bed but smaller than a full-size bed. The “XL” stands for “extra-long,” indicating that it is longer than a full bed or regular twin bed.

A Twin XL bed typically measures around 39 inches in width and 80 inches in length (99 cm x 203 cm). In comparison, the room size of a standard twin bed measures around 39 inches wide and 75 inches long (99 cm x 191 cm).

The Twin XL bed makes it suitable for taller individuals who may find a full queen-size bed or standard twin bed too short. It offers more space for stretching out comfortably while still being compact enough for smaller bedrooms or shared living spaces. Due to its popularity in college dormitories, Twin XL bedding, and sheets are readily available in many retail stores and online outlets.

Other Mattress Sizes

Various mattress sizes cater to different sleep preferences and space requirements. Beyond the compact twin and twin XL mattresses, larger options like full, Queen, king, and California to king-size beds are available to suit diverse needs.


A full-size mattress measures 54 inches in width by 75 inches in length, offering ample space for a single sleeper to stretch out comfortably without overwhelming the bedroom’s layout. Often referred to as double beds, full mattresses are perfect for solo sleepers but may not provide sufficient space for couples, offering only a crib mattress-sized area for each person.


The queen-size mattress is a popular choice for many couples and single sleepers alike, and it. Its dimensions are 60 inches in width and 80 inches in length. It strikes a balance between space and cost, leading many couples to prefer it over a king size for better affordability and space utilization. Additionally, there are variations like the California Queen, which adds 4 inches to the length memory foam mattress, and the Olympic Queen, which offers an extra 6 inches in width.


With its expansive dimensions of 76 inches by 80 inches, a king-size mattress provides the most significant sleeping space, making it a preferred choice for couples who desire more personal space during sleep. Furthermore, it is also an ideal option for parents seeking co-sleeping arrangements with their children.

California King

The California king-size mattress, measuring four feet tall, 72 inches wide, and 84 inches long, caters to taller individuals who require extra legroom while sharing the bed with a partner. Its elongated design fits well in narrow master bedrooms, providing both comfort and practicality.

When choosing a mattress size, it’s essential to consider individual preferences, sleeping habits, and available space to ensure a restful night’s sleep for all.

Who Should Buy A Single Or Twin Bed?

Deciding between a single or twin bed depends on individual preferences and requirements. Both twin and single beds and mattress sizes can be suitable for different purposes, and here are some factors to consider:


A single or twin-size bed serves as an excellent choice for kids. Not only are they more affordable than crib mattresses, but they also offer longevity for growing children aged 4 to 12.

Families with multiple toddlers and more than one child can find it practical to invest in a pair of twin beds. This allows each child to have their own comfortable space to sleep and enjoy their time.


Adults who are under six feet in height can sleep comfortably on either a single or twin bed. However, taller individuals may prefer a king bed or twin XL bed for additional space and comfort. Remember that these options are suitable for single use unless an extra mattress is acquired for more sleeping space.

Guests or Vacation Homes

Single and twin beds present excellent cost-effective options for those looking to furnish rental properties like vacation homes on a budget.

In conclusion, the ideal mattress size depends on the specific needs and the intended purpose of the bed. Considering individual comfort and space requirements will help make the best choice, whether it’s for children, adults, or rental properties.

Which Mattress Size Is Right For Me?

Whether you’re in search of a mattress for a single person or a twin with ample space, several crucial factors must be considered before making your decision.

Room Space

One of the advantages of opting for a single or twin bed is their ability to fit into smaller rooms effortlessly, unlike their larger counterparts, such as Queen or king-size beds. Whether you go for a twin XL variation or a regular twin mattress, you’ll find these options to be flexible and versatile, eliminating worries about space constraints.


For those concerned about their budget, the affordability of single and twin beds is a major plus. You can find high-quality mattresses at relatively low prices. This cost-effective choice allows you to enjoy the benefits of a top-quality mattress, including optimal temperature, instant response, and pressure reduction, without straining your finances.

Number of Sleepers

Single or twin beds are well-suited for one to two young children or a single adult sleeper. However, taller individuals may prefer a queen mattress, twin XL or full-size mattress for added comfort and space.

While a regular twin-size mattress is ideal for a single adult, it may not be the best choice for couples. If you plan to share the bed with a partner, consider a larger mattress like a queen or king-size, which provides more room to move around, play with kids or pets, and stretch out. Keep in mind that larger mattresses typically come with a higher price tag.

Sleeping Position

Your favored sleeping position is another crucial factor to contemplate when selecting the appropriate mattress size. While single or twin beds are popular and budget-friendly options, their limited space may not always cater to the most comfortable sleeping positions.

For side sleepers, look for a mattress that allows your head and back to sink comfortably while maintaining proper spinal alignment. Back sleepers should seek a mattress that provides support for the spine while allowing the back, head, and arms to sink comfortably. On the other hand, stomach sleepers require a mattress that keeps the spine straight while supporting the arms and stomach.


Choosing the right mattress size is essential for a good night’s sleep. The Single and Twin bed size mattresses, are excellent choices for solo sleepers, kids, and teenagers, as well as for rooms with limited space. However, if you are taller or share your bed with a partner, it’s best to opt for larger sizes. Remember to consider your specific requirements, sleeping habits, and budget when making your decision. Now that you better understand the differences between Single and Twin bed size mattresses, you can now confidently select the one that aligns most effectively with your requirements.


What are the standard dimensions of a Single bed size mattress?

A Single bed size mattress typically measures 39 inches in width and 75 inches in length. However, in some regions, it may be referred to as a Twin bed dimensions single side mattress and have a width of 38 inches.

Can a Single or Twin mattress accommodate couples?

No, both Single and Twin mattresses are designed for one person. They are not spacious enough to accommodate two twins or couples comfortably.

Are Single and Twin mattresses suitable for children?

Yes, both Single and Twin mattresses are great options for kids and teenagers. They provide sufficient space for a comfortable night’s sleep.

Are Single and Twin mattresses budget-friendly?

Yes, Single and Twin mattresses are generally more affordable compared to larger sizes like Queen or even King beds. They are a budget-friendly choice for those looking to save money.

Are Twin mattresses used for bunk beds?

Yes, Twin mattresses are commonly used in bunk beds, especially in children’s rooms or guest bedrooms.

Can I use a Single or Twin mattress in a daybed?

Yes, both Single and Twin mattresses are suitable for daybeds, offering a cozy spot for lounging or accommodating guests.


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