Twin vs Full Bed

Twin and Full mattresses have a lot in common. For starters, they're narrower and boast more affordable price tags than the popular queen and king mattresses. They also make excellent picks for older kids and solo sleepers and work well in small spaces, including dorm rooms, smaller bedrooms, and apartments. However, each mattress size is unique and has its own merits and demerits.

So, what are the differences between full and twin mattresses, and which size should you go for? 

This quick guide will cover everything you need to know about twin vs full beds, including dimensions, pros and cons, performance, and other crucial factors for buyers. 

Twin vs Full Comparison

If you plan to invest in a smaller mattress, you must first remember that full and twin beds aren't the same size. Standard full and twin mattresses are great space savers compared to queen and king beds. They're both less wide than these two popular options and are the beds of choice for solo sleepers. 

The biggest difference between a full and a twin-size mattress is the width, which can either make or break a healthy sleep. Full beds are a few inches longer than twin mattresses, and are often considered the best alternative for taller teens and adults. Conversely, twin beds are slightly shorter than full mattresses and are most commonly used in kids' and dorm rooms.

Twin mattresses are the cheapest adult beds. Typical sticker prices fall around $150 for a 10-inch deep budget model, $500 for a mid-range mattress, and $900+ for a luxury or organic mattress. On the other hand, full-size beds cost around $250 for a budget mattress, $800 for a mid-range bed, and $1,500+ for a luxury or organic model. 

While these mattresses are more expensive than twin-size ones, you can opt for a full mattress for an older kid, as it could provide the best value for your money in the long run. With a full-size mattress, you won't have to upgrade your kid's bed later in their teens. 

Related content: King vs queen mattress comparison

Check out our comparison table below for a summary of the differences between twin and full mattresses.





54 inches

38 inches


75 inches

75 inches

Width per Person

27 inches per sleeper

Too narrow to accommodate two adults

Best for

Children, teenages, young adult

Bunk beds, children, shoppers on a budget

Ideal For

Guest rooms, children's bedrooms, larger bedrooms

Childrens bedrooms, smaller bedrooms

Recommended Room Size

10 feet by 12 feet.

7 feet by 10 feet.


More spacious, easy to find accessories for

More affordable.


More expensive

Too small for taller, sleepers and couples.


$250 - $2500


Best Active Sale

Full-Size Mattress Overview

A full mattress, also known as a double mattress, is larger than a twin-size mattress and is designed for a single sleeper who wants more space or for a couple who wants to share a bed without feeling cramped. It measures 54 inches wide by 75 inches long, making it wider and longer than a twin. It could also be an excellent option if your master bedroom is extremely small. Here are the pros and cons of full mattresses:


  • More space: Full beds offer more space than a twin mattress, making them a good choice for single sleepers who need more room or couples who want to share a bed. Generally, full-sized mattresses are the perfect size for master bedrooms and studio apartments. 
  • Great for solo sleepers: Unlike twin mattresses, which don't give single adults more room to comfortably sprawl out, full mattresses offer a generous amount of space for a single person, allowing you to spread out, toss, turn, and change sleeping positions with ease. 
  • Affordable: Full beds are more affordable than larger mattress sizes like queen or king, offering ample sleeping space at pocket-friendly prices. This makes them a perfect option for those on a budget.
  • Versatile: Full beds are a good choice for guest rooms, young adults who are moving out on their own for the first time, or anyone who wants a larger mattress without spending a lot of money.


  • May be too large for some spaces: Full mattresses are larger than twin mattresses, so they may be too big for small rooms or apartments.
  • May not provide enough space for couples: While full mattresses are a good option for couples who want to share a bed, they may not offer enough space for larger or restless sleepers. A full-size mattress may not give you the comfort you need if you prefer more sleeping space to avoid disturbing your partner when you change sleep positions at night. Similarly, if you like having your kids and pets with you in bed at night, you might benefit from the extra space that a king or queen mattress provides.
  • Not as large as queen or king mattresses: If you're looking for a lot of space to spread out, there may be better options than a full mattress. Tall sleepers may find their feet struggling to find legroom or their head hitting against their headboard. In such instances, a king or queen mattress could be a perfect pick.

Who is it good for?

Full beds are ideal for single sleepers needing more space or couples wanting to share a bed without feeling cramped. They are also a good option for guest rooms, young adults who are moving out on their own for the first time, or anyone who wants a larger mattress without spending a lot of money.

More and more parents are skipping twin mattresses and moving straight into full-sized beds because they are versatile, allowing their children to move into their teens and even adulthood with the same sleeping space. 

Note: While co-sleeping is possible on full-size mattresses, most sleep experts don't recommend sharing a full bed as a long-term fix, especially for hot sleepers or individuals who experience aches, pains, or sleep problems. Remember, to get healthy and restorative sleep, each person needs enough room to toss, turn, fully stretch out, and find a perfect position for their spines and other pressure points to rest comfortably.

That's why most co-sleepers with different sleep preferences are better off with split king mattresses. For those wondering what is a split king mattress, it's basically 2 twin XL mattresses on a king-size frame. These mattresses allow each sleeper to customize their side of the bed to suit their unique needs.

Twin Size Mattress Overview

A twin bed is the smallest standard mattress size and is designed for a single sleeper. It measures 38 inches wide by 75 inches long, making it ideal for children, teenagers, and adults living in small spaces or dorm rooms. 

Another option worth considering is putting two twin-size beds in your guest room to get the equivalent width of a king-size mattress. There are numerous reasons why you should do this, including offering comfort for individual co-sleepers and having an option of separating or pushing the mattresses back together to accommodate different guests. 

Here are the pros and cons of twin mattresses:


  • Affordability: Twin beds are the most affordable mattress size, making them an excellent option for those on a budget.
  • Space-saving: Twin beds are perfect for small rooms or apartments with limited space. They allow you to maximize your living space without sacrificing comfort.
  • Easy to move: Twin size beds are lightweight and easy to carry, which is excellent for those who move frequently or for guest rooms.
  • Kid-friendly: Twin-sized beds are excellent options for helping young kids transition to larger beds when they've outgrown their toddler beds. Plus, twin-sized mattresses are the standard size for bunk beds. 


  • Limited space: Twin mattresses are too small for most adults, and taller people may find them too short and uncomfortable for a good night's sleep. Unless you're purchasing a single bed for your kid or planning to get multiple ones, a twin-sized mattress may be less than adequate.
  • Not suitable for couples: A twin bed is too small for two people, even if they are small in size.
  • Not as comfortable: Twin mattresses offer less support and comfort than larger mattresses, which may not be suitable for those with back or joint pain.

Who is it good for?

Twin mattresses are ideal for teenagers, young adults who are on a tight budget or live in small spaces, and kids transitioning from a crib mattress into a big kid bed. They are also an excellent option for guest rooms, bunk beds, or anyone who wants to save money.

Thanks to their size and weight, these mattresses are a breeze to move, so rotating or flipping your mattress (something most mattress brands recommend to prolong your bed's lifespan) won't be as much of a chore.

Note: Some single adults will find the width of twin beds too narrow. However, if you have a smaller body size or are under average height, a twin mattress may still be a good alternative, especially if you want a mattress that fits into a smaller bedroom or dorm room. 

Twin vs Full Bed Size Variations

The twin and full beds have one size variation: twin XL and full XL. These variations are about 6% larger than their standard sizes, giving extra foot space to sleepers.

Twin XL Mattress

Twin XL beds are the same width as standard twin beds but are about 5 inches longer, making them the same length as queen and king beds. They're perfect alternatives for college dormitories and taller kids who may have smaller bedrooms. The ample spacing for more than two kids will make you love these mattresses. 

You'll also find them in most hostels with multiple beds in one large room. Twin XL mattresses can also work for couples who want adjustable bed frames, as two XLs pushed together make the size of a standard king mattress. 

Full XL Mattress

Full XL mattresses are the same width as standard full beds but have an extra 5-inch length that matches queen, king, and twin XL size options. They provide ample legroom for rapidly growing kids and can also work well for some couples, especially those with average weight and size. 

Related Content: Full vs Queen Mattress

Factors to Consider When Choosing Between a Full Size Bed and a Twin Bed

Brand and product research is crucial for finding the best twin mattress or full model.. Each model provides a unique sleep experience and is engineered for individuals with certain sleep positions, body types, and firmness preferences. Always keep that in mind as you read product descriptions and visit mattress websites.

Here are 4 critical factors to consider when deciding between a twin or full mattress:


The buying price is something shoppers must consider while drawing the full vs. twin mattress comparison chart. You can find full and twin-size mattresses with diverse prices today, making it even more crucial to understand the maximum amount you can spend.

In general, full-size mattresses are more expensive as compared to twin beds. Where a twin bed can cost you anything between $100 to $1,500, you can pay anywhere between $250 to $2,500 for a full mattress. This price difference is often not more than a few hundred dollars, resulting in twin beds being significantly smaller than full-size mattresses. For other sleepers, the added space of a full mattress can make it a worthwhile investment.

Room Size

The size of your room also significantly impacts the choice between a twin or full bed. Placing a full-size mattress in a very small space can leave little room for movement and make your sleep environment crowded, while a standard twin mattress may seem inadequate in a large master bedroom. 

That's why the perfect size of the rooms for these particular beds should be considered. A twin mattress is best suited for a room that measures at least 7 feet by 10 feet, while a full-size bed works well with a room measuring 10 feet by 12 feet. There will be enough space around your mattress to move around, lie down, and get up from the bed comfortably. 

Height and Sleeping Position

Sleeping positions define how people put their bodies while sleeping. Different sleepers prefer different styles to maximize their comfort. In general, the perfect sleep position should promote proper body alignment along your spine. 

If you're taller than 6 feet, you'll likely find that full beds feel cramped, especially in terms of leg room. For solo sleepers, a twin XL mattress may be a solid choice. However, for taller couples, upgrading to queen-size mattresses may be necessary. 

Related content: California king vs king bed

Sleeping Partners

Keeping your partner's sleep preferences and positions in mind is vital for choosing the right mattress size. If you share your bed with your spouse or kid, a twin XL bed might be too small. Even full and full XL mattresses might feel cramped for some couples, but they offer a viable solution for solo sleepers with pets or small kids. 

If you're a taller sleeper, you may want to opt for a California king mattress, as it boasts more leg space for sleepers to stretch out in. 

Twin vs Full Mattresses: The Verdict

Whether you need a full or twin mattress depends on the available space in your room, your budget, and who will use the mattress. Overall, a twin-size bed is a solid pick for older kids and teens transitioning to a bigger mattress. Individual adults of average weight and size will also find twin mattresses comfortable. And as the smaller and cheaper option of the two sizes, twin-size beds are the best choice for tighter spaces and shoppers on a budget.

On the other hand, if you have more space to play with, full beds are a worthy investment for older teens and allow solo sleepers to stretch out easily. While you can comfortably fit more than one individual on a full bed, it's wise to go for a full XL or a queen-size bed if you want a mattress for two people. 

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