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Single vs. Twin Bed Size: How Do They Compare?

Lots of people seem to be wondering about the difference between the Single and the Twin bed.

It’s obvious that sizing is one of the most important considerations when choosing a mattress, so let’s have a closer look and identify the difference between those two commonly mistaken types.

Single vs. Twin Bed

 Twin BedSingle Bed
PriceLeast expensive, similar to SingleLeast expensive, similar to Twin
Best ForChildren and teens, solo sleepers, guest rooms, extra-small bedroomsChildren and teens, solo sleepers, guest rooms, extra-small bedrooms

Is there a difference between a Twin and Single bed?

No, Twin and Single beds are the same size!

Experts Discuss Mattress Sizes

Check out our full list of the best Twin mattresses

Are Twin and Single Mattresses the Same Size?

Yes, Twin and Single mattresses are the same, size-wise. However, it’s their original intended uses that differ.

A Single bed is 38 inches wide and 75 inches long. Its main designation is to fit one person, which is where the name “Single bed” stems from. These are comfortable and convenient for kids’ rooms and are likely going to be suited for children until they reach high school age, which is when a Twin bed may no longer be long enough to accommodate their height, though this will depend on the particular teen. 

As mentioned above, a Twin is identical to a Single in terms of sizing. However, it was originally intended to be one of a pair of Single beds. They are usually put in guest rooms which would be shared by more than just one person. They are also commonly chosen by couples who prefer to sleep together but not to share their bed as they don’t feel comfortable.

It’s also important to note that there are a few different variations of the Twin-size bed, including the Twin XL.

View Our Full Comparison: Twin vs. Twin XL Mattresses

Who Should Own a Twin (Single) Bed?

Twin and single beds were originally designed to go in matching pairs. The most common application for them is the regular double room in a hotel. A lot of hotels use this instead of a King-size to accommodate the versatile demands of single clients and those who are a couple.

Additionally, a Twin mattress, as we mentioned above, is preferred for rooms that have to be shared by siblings, for example.

It’s important to note, though, that “Twin” is now the more commonly used name to represent the Single-size bed. This means you can use a Twin bed as you would a Single.

Need more info? Check out the Best Twin Mattresses here.

What to Consider When Choosing a Twin or Single Mattress


Twin and Single mattresses are the smallest conventional beds that you can buy. Their size makes them great for children and guest rooms. These beds will come in at approximately 38 inches wide by 75 inches long, and that should allow most average-size adults to sleep comfortably in a Twin or Single bed. However, those who are 6 feet tall or more may want to consider a Twin XL or a Queen. Also, heavyweight sleepers should check that the mattress has enough weight capacity to support them. 

Who’s Sleeping in the Bed?

Since Twin and Single beds are the smallest of the standard sizes, this can impact who should use them. These mattresses are often a good choice for kids and teens and can even work well for young adults in college dorms. With 75 inches in length, these sizes can accommodate people who are around 6 feet tall but won’t give them a whole lot of extra room beyond that. In that case, we recommend a Twin XL mattress, which is 5 inches longer, for taller teens and adults. Also, Twin and Single mattresses don’t always hold as much weight as Queen or King sizes, which means they might not work as well for significantly heavier adults.


Twin mattresses are typically the least expensive size. The smaller size means that fewer materials are needed, which helps keep costs down. This makes them a great choice for solo sleepers who are trying to save money. Their cheaper price also lends to them being a good fit for guest rooms. 

Furthermore, going with a smaller size may mean you can afford a better-quality bed or one made with luxury materials. If you are interested in a high-end or organic mattress but are afraid that it is out of your price range, going with a Single/Twin size may allow you to bring home the bed you desire. 


Although Single and Twin mattresses are smaller than other options, this doesn’t mean they are uncomfortable. Manufacturers that offer Twin beds (most of them do), put the same materials and craftsmanship into their smallest model as they do all the other sizes. 

A bed that you find comfortable is largely dependent on your personal preferences. However, you should also take your body weight and preferred sleeping position into account as these can affect what type of mattress will work best for you. 


Bedding is an excellent way to add comfort and personal style to your bed. Twin or Single beds are an in-demand size, and this means that a variety of accessories should be easy to find. Twin accessories are also more affordable than other-size bedding. 

Twin beds are often used in children’s rooms and there are a host of available options that should be appealing to kids. Also, you should keep in mind that dorm rooms are often furnished with Twin XL beds to accommodate taller students. If you are buying bedding for a college student, make sure that you check this as standard Twin bedding will not fit this correctly. 

Room Size

Twin beds aren’t typically used in master bedrooms. These rooms are usually around 12 feet by 14 feet or 12 feet by 16 feet, and the size of a Twin bed may look small and out of place in this big of a space. For master bedrooms, you may want to consider a Queen mattress as they usually provide a great balance when it comes to bed and room dimensions. 

However, Twin beds can make a good choice for other bedrooms that are around 10 feet by 10 feet. Singles would provide more space for additional furniture in these rooms, and if you have a guest room that is smaller than average, Twin beds are a great choice because they won’t be overwhelming. 

Twin and Single-Size Mattress Pros and Cons

Cheaper option
Accessories are less expensive and easy to find
Take up less space, making them a great choice for small rooms
They can only hold one person
May have a smaller weight capacity
These beds may not be long enough for people over 6 feet tall

Get More Info: Best Beds for Teenagers

FAQs About Single vs. Twin Mattresses

Is there a size difference between a Twin bed and a Single bed?

No, Twin beds and Single beds have the same dimensions, which are typically 38 inches wide by 75 inches long. When it comes to these mattresses, the only difference is that some people call them Twins and others refer to them as Singles.

Is a Twin size good for one person?

Yes, Twin-size beds can be a good option for one person. These beds should give children and most average-size adults enough room to reposition through the night while remaining comfortable. However, those who are over 6 feet tall or who weigh more than 230 pounds may want to get a larger size.

Why is a Single bed called a Twin?

Twin beds were originally intended to be a pair of Single beds, often in places like hotels as an alternative to King or Queen beds. It seems that over time, the name “Twin” stuck more within the mattress market and is now the more commonly used title for this mattress size. Additionally, some Twin beds may be sold in pairs, but single options are commonplace now.


There is no difference in the Single and Twin measurements, but the original purposes of both beds were slightly different. Twin beds were originally considered part of a pair of Single beds. However, the term “Twin” is more often used to describe Single-size mattresses measuring 38 inches by 75 inches.  

Twin/Single mattresses are ideal for children, solo sleepers, and guest rooms. Their smaller size also means they’re a budget-friendly option, costing the least of all the standard mattress sizes.

Jill Zwarensteyn

Jill Zwarensteyn


About Author

Jill Zwarensteyn is the Editor for Sleep Advisor and a Certified Sleep Science Coach. She is enthusiastic about providing helpful and engaging information on all things sleep and wellness.

Combination Sleeper