Twin VS Full Mattress – What’s the Difference?

Most people know that there are six main types of mattress sizes available on the market, but what if we told you there’s like 11 different ones to choose from (10, if you rule out the crib mattress which is the smallest one of all)? As hilarious as it may seem, there are still situations where people buy a bed in a size that’s not suitable for them.

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It’s either too small to accommodate two people or too big to fit in a small bedroom. Knowing the differences between mattress sizes and understand who they are designed for is a great part of the new product research process. Today, we’re going to analyze the differences and similarities between a Twin and a Full-sized bed.

All About the Twin Bed

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Being the smallest version of an adult mattress, the Twin-sized bed is preferred in a lot of different situations by several categories of sleepers. The reason why this bed size is so popular is because it measures 38 by 75 inches, making it really easy to fit even in small bedrooms. In the following sections, we are going to determine what are the main characteristics of a Twin-sized bed and see if you would currently need to make this purchase.


A Twin-sized bed measures 38 by 75 inches. However, it is very important to point out that there is also a Twin-XL mattress size available, which is 5 inches longer compared to the regular Twin, measuring 38 by 80 inches.

Who’s It For?

If you are an adult looking to buy a new mattress and come across the dimensions of a Twin bed, you might be thinking that this bed is way too small for you. Who are Twin mattresses designed for, anyway?

  • If you’re looking to buy furniture for a small bedroom, consider investing in a Twin-sized bed. They are great for small bedrooms and cramped spaces.
  • If you’re looking to move the mattress around a lot, then weight becomes an important shopping consideration. Since the Twin bed is smaller compared to other mattress sizes, it’s also more lightweight, which makes it better for those of you that often end up in situations where they have to move the mattress.
  • Since the size of the mattress will always have an impact on the end price, Twin mattresses are cheaper compared to almost every other option on the market (the only mattresses that are actually cheaper than a Twin bed are crib mattresses and short Twins).
  • Because they are designed to comfortably accommodate one single person and are shorter in lengths compared to larger beds, Twin-sized mattresses are mostly designed for young adults. They are also a great option when you’re looking for a college student mattress, as they can easily fit bed frames of bunk beds both on and off campus.
  • Their rather compact size also makes them a viable solution for boats and RVs, where space is quite limited.

What’s it Made From?

As a standard mattress size, the Twin-sized bed is available in all configurations and material combinations that are found in larger and more commonly sold mattress sizes (such as the Queen). You can expect to find Twin beds made from foam (a type of product that consists of cheaper beds with a lifespan of around 5 to 6 years), latex (a more durable materials that makes up mattresses which can resists up to 7 years on average), hybrids (more expensive, but offer great support and last around 6 to 7 years), innerspring (made with a coil support core and have a lifespan of around 5 years), and airbeds (more expensive and sophisticated, but also with a higher lifespan f about 7 to 9 years).


There are plenty of accessories available on the market for a Twin-sized bed because it is considered one of the 6 standard mattress sizes on the market. Everything from bed frames to pillowcases is more accessible in terms of price if you’re considering of buying them in a Twin-sized version. Make sure that you have a compatible bed frame/box spring and that you purchase a mattress protector to shield your mattress in the long run.

All About the Full Bed

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Single adults that don’t share a bed are often more attracted to the idea of investing in a Full-sized bed. These types of mattresses are among the oldest ones known to man, and until the mid-20th century, they were also labeled as representing some of the largest bed sized on the market. Today, full-sized beds are the largest types of beds for single sleepers, perfect for bunk beds and small bedrooms. 


Full-sized beds normally measure 54 by 75 inches, but there is some Full bed that measure 53 inches in width (this varies from one mattress manufacturer to another). They are way wider when you compared them with Twin beds, but they are a few inches narrower and shorter compared to the next largest mattress in the line-up: the Queen-sized bed.

Who’s it For?

The truth of the matter is that Full-sized beds, while wider compared to Twin-sized ones, address a very similar market segment. These beds are mostly suitable for:

  • Single adults that don’t share a bed. If you sleep alone and don’t need all the space provided by a Queen-sized bed, a Full mattress is just the right choice for you. For some adults, a Twin-sized bed might be too narrow, making the Full mattress a viable choice.
  • College students that sleep in regular or bunk beds. A Full-sized mattress is perfect for a dorm, where bedroom space isn’t all that generous. Both on and off-campus housing can benefit from students sleeping in Full-sized beds.
  • Teenagers with small bedrooms. The compact size of a Full mattress is great for young adults that generally don’t have that much bedroom space available and could use every extra inch of free space to move around.

What’s it Made From?

Much like Twin-sized beds, Full mattresses are very easy to find. They are made from a variety of materials and combinations that stack layers upon layers, designed to provide you with support, comfort, and plenty of nights of good sleep (provided you understand what your body needs and choose a mattress construction that’s right for you).

Full-sized beds are made from foam (which is the best mattress choice in terms of body contouring and pressure point relief), latex (which is naturally cooling but also one of the most durable materials choices out there), innerspring (redesigned versions of the traditional coil mattress which are great in terms of breathability and support), and hybrids (bringing the best of multiple worlds and providing good pressure point relief, decent edge support, and temperature neutrality). There are also some air mattresses available in a Full size. These beds have internal air chambers that allow you to adjust the firmness of the mattress, making them highly customizable and sophisticated, but also very expensive.


If you’re worried about buying a Full-sized bed and not finding accessories for it, you shouldn’t worry anymore. It is very easy to find all sorts of bedding-related items designed for this mattress size, from adjustable bed frames to fitted sheets. These accessories are available both online as well as in brick-and-mortar stores, and they are designed for every taste and every budget.        

Which One Is Better for You?

Out of all the available bed sizes out there, the Twin and Full mattresses are the ones that probably share the most similarities. Even if a Full mattress is better because of its more generous width, if you’re looking to buy a new bed for a teenager or a young adult, both of these options will serve just fine. However, if you are an adult who sleeps alone, a Full-sized bed might be a better option simply because it offers a larger sleeping surface.


When you’re down to choosing between one of these two-bed sizes, consider both your body configuration as well as the bedroom space you have at your disposal. For small beds and teenage bedrooms, the Twin-sized mattress is clearly the winner, but older adults sleeping alone would surely take more comfort in sleeping on a Full-sized mattress. Make sure your review all the factors and specifications before making your choice.