Twin vs. Full Mattress Sizes

Written by Zulekha Nishad

Last Updated July 9, 2024

Are you a parent or adult looking for the perfect new mattress to complete your bedroom setup? If so, you may be torn between choosing a twin or full bed size. It can be tough to decide which is best for your needs, so we're here to break down the differences between these two sizes and help make deciding a little easier. Keep reading as we compare factors like space requirements, price points, comfort levels, and more relating to twin vs full mattress sizes.

twin vs. full mattress sizes - detailed guide

Key Takeaways:

  • Twin mattresses are narrower and shorter (39 x 75 inches), while full mattresses are wider (54 x 75 inches).
  • When choosing between the two, make sure to select the mattress size based on the available space in your room.
  • Twin mattresses are best for solo sleepers, while full mattresses offer more room for single sleepers or occasional sharing.
  • Twin size mattresses are ideal for young children, and full mattresses suit older kids and teenagers.
  • Full size mattresses can serve as both a single sleeper's bed and a guest bed, whereas twin mattresses are excellent for space-efficient solutions in shared rooms.

latex mattress

What is a Twin Size Mattress?

A twin size mattress, measuring 38 inches by 75 inches, is the smallest standard mattress size available in the market. Often referred to as single beds, these twin-sized mattresses are a popular choice for children who have outgrown their cribs. Their compact dimensions, ease of maneuverability, and budget-friendly pricing make them a fantastic option for children's bedrooms and constrained living spaces, such as studio apartments.

Moreover, twin size mattresses are compatible with bunk beds, making them the best mattress choice for families with multiple children, as they efficiently utilize living space, creating more room for play and activities. Twin beds are widely recognized for their space-saving capabilities, allowing for smart and efficient use of available space.

While a twin-size mattress can comfortably accommodate a growing teenager or an average-sized adult, it doesn't leave room for another sleeper. Nonetheless, the compactness and versatility of these mattresses make them a practical choice for a variety of living situations, particularly when space is limited.

Twin size bed dimensions

  • Dimensions in inches: 38 X 75 inches
  • Dimensions in cm: 96.5 X 188.0 cm
  • Dimensions in feet: 3.16 X 6.25 feet

twin size mattress

Pros of a Twin Mattress

Easy to Move: Twin mattresses are super light and easy to slide around. So, when you want to change your room or give your bed a good cleaning, it's not hard work.

Affordable: They don't cost as much as the big ones. So, if you want a comfy bed without spending too much, twin mattresses are a money-saving choice.

Great for Kids: Twin mattresses are just right for children. They're not too big or too small – they're perfect. And they don't cost parents a fortune.

Fits Bunk Beds: If you have bunk beds, twin mattresses fit perfectly. It's more like a puzzle piece that completes the picture. Everyone gets their own bed.

Cons of a Twin Mattress

Limited Length for Tall Sleepers: Twin mattresses are designed more like sleeping bags, which can be too short for individuals taller than 6 feet. This means that teens and adults above 6 feet may find their feet dangling over the edge and their sleep quality compromised.

Inadequate Room for Growing Kids: Kids grow quickly, but twin mattresses remain the same size. As children get taller, they might start to feel cramped in their twin beds, which can lead to discomfort and the need for an upgrade to a larger mattress.

Twin Size Mattress Variation

The Twin XL mattress is a modified version of the standard twin size, offering an additional 5 inches in length. This extra length serves as a boon for taller individuals seeking more room to stretch out comfortably during their slumber.

twin xl beds

Measuring 38 inches in width and 80 inches in length, Twin XL mattresses offer an ideal solution for average-sized individuals residing in cozy studio apartments or compact bedrooms.

Furthermore, Twin XL mattresses hold the esteemed status of being the standard choice in college dorm rooms. Given that dorm mattresses must cater to a diverse range of single adult sleepers, the Twin XL's dimensions prove optimal for these shared living spaces. Its adaptability, in terms of size, makes it a favored selection for guest room mattresses, ensuring that overnight visitors can rest soundly without feeling cramped.

Twin XL size bed dimensions

  • Dimensions in inches: 38 X 80 inches
  • Dimensions in cm: 96.5 X 203.5 cm
  • Dimensions in feet: 3.16 X 6.66 feet

What is a Full Size Mattress?

A full-size mattress, also known as a double mattress or double bed, distinguishes itself by its greater width compared to a twin-size mattress while sharing the same length, measuring 54 inches in width and 75 inches in length. This extra width makes a full mattress a comfortable option for a single sleeper and is technically suitable for accommodating two adults, although it's more commonly used for one person.

Full mattresses are particularly well-suited for older teenagers and young adults who are transitioning to more spacious sleeping arrangements as they venture into independent living.

In the historical context, full-size beds were once the standard choice for couples until the introduction of queen-size mattresses in the 1940s. Today, full-size mattresses are considered too compact for couples, with the queen-size and king-size options offering more room for two adults.

However, full-size mattresses remain a comfortable and space-efficient choice for solo sleepers, guest rooms, and small apartments, maximizing sleeping space in more confined environments.

Full size bed dimensions

  • Dimensions in inches: 54 X 75 inches
  • Dimensions in cm: 137.16 X 190.5 cm
  • Dimensions in feet: 4.5 X 6.25 feet

full size mattress

Pros of a Full Mattress

More Sleeping Space: A full size mattress provides significantly more sleeping space than a standard twin mattress. This extra room allows for a more comfortable night's sleep, especially for individuals who appreciate some extra space to move around.

Perfect for Teenagers and Single Adults: Full size mattresses are an excellent choice for teenagers transitioning from a smaller mattress, as they offer ample space to grow into. They are also perfect for single adults who want a cozy yet spacious sleep surface.

Fits Small Bedrooms: Full size mattresses are versatile and fit well in small bedrooms or guest rooms. They strike a balance between providing enough space to sleep comfortably and not overwhelming a limited area.

Cons of a Full Mattress

Too Small for Couples: One of the major drawbacks of a full size mattress is that it can be cramped for couples. While it may work for a smaller living space or temporarily, it's not ideal for two people who want more room to spread out during the night.

Higher Cost Than a Twin: Full size mattresses typically cost more than twin mattresses, and this can be a concern for individuals on a tight budget. However, it's essential to consider the long-term comfort and sleep quality when making this investment, as a larger mattress can greatly affect your overall well-being.

Full Size Mattress Variation

The Full XL mattress is a variation of the standard full size, designed to accommodate individuals who require extra length for a more comfortable night's sleep.

full xl size mattress

Measuring 54 inches in width and a generous 80-inch length, the Full XL mattress offers an additional 5 inches of legroom compared to its traditional counterpart. This additional length makes it a fantastic choice, particularly for taller individuals, providing ample space for them to stretch out and relax.

Despite the advantages of the Full XL, potential buyers should be aware of a few considerations. One such aspect is the relative scarcity of Full XL mattresses and related accessories in the market. This limited availability can make it more challenging to find the right bedding components, such as sheets and bed frames, to complement the Full XL mattress perfectly. As a result, some shoppers might find it more convenient to opt for a queen mattress instead when seeking extra legroom.

Twin vs. Full - Mattress Size Comparison Chart

Here's a detailed comparison of twin vs. full size mattresses:

LENGTH 75 inches 75 inches
WIDTH 38 inches 54 inches
SURFACE AREA 2850 square inches 3975 square inches
MINIMUM RECOMMENDED ROOM SPACE 7 X 10 feet 9.6 X 10.6 feet
BEST FOR Kids, single adults, or small bedrooms Teens, single adults who likes to sprawl out, or guest rooms
PRICE RANGE $250 to $1000 or more $400 to $1500 or more

What to Consider Before Choosing Between a Twin and a Full Bed?

twin vs full - what to consider before  choosing between both the sizes

1. Room Size

Measure the dimensions of your bedroom to determine how much space you can allocate for your bed. It's essential that the mattress fits comfortably within the room without overwhelming it.

A twin bed is a more space-efficient option. It's ideally suited for smaller bedrooms or guest rooms. To accommodate a twin bed comfortably, your room should have a minimum width of around 7 feet and a length of at least 10 feet.

On the other hand, a full bed requires more space. To ensure a full bed fits comfortably, your room should ideally have a minimum dimension of 9 feet 6 inches width and 10 feet 6 inches length.

2. Budget

Your budget is a significant factor when choosing between a twin and a full bed. Twin mattresses are generally more affordable than their full-size counterparts.

On the lower end, you can find budget-friendly twin mattresses for as little as $250 to $500. Mid-range twin mattresses, with better features and materials, fall in the $500 to $1000 range. Premium or luxury twin mattresses, made with high-quality materials and advanced technologies, can cost $1000 or more.

You can find budget-friendly full mattresses starting at around $400 to $800. Mid-range full mattresses, offering better support and comfort, range from $800 to $1500. Premium full mattresses can cost $1500 or more.

It's important to keep in mind that the cost of mattresses can be influenced by factors such as thickness, construction, and brand reputation.

3. Sleeping Habits

If you're someone who values ample space and tends to sprawl out during the night, a full-size bed might be more suitable. It offers extra room for movement and comfort.

On the other hand, if you're a minimalist sleeper who tends to stay in one position and doesn't require extra space, a twin bed could be sufficient. It can be a practical choice if you have a smaller bedroom or need to maximize the available space for other furniture or activities.

natural and organic latex mattress topper

Which One Should You Buy?

twin vs full - which one should you buy?

When to Opt for a Twin Mattress:

  • If your child is ready to graduate from a crib to their first "grown-up mattress," a twin bed is an excellent choice. It provides a comfortable and age-appropriate sleeping space for young ones.
  • When you're setting up a bunk bed, a twin mattress is the go-to option. Its compact size fits perfectly within the bunk's limited space, ensuring safety and comfort for those using the bed.
  • If you're looking for the most budget-friendly mattress option, a twin bed is typically more affordable.

When to Opt for a Full Mattress:

  • As a recent college graduate moving into your new apartment, a full mattress offers more sleeping space and comfort compared to a twin.
  • If you're a single person living alone, a full bed provides ample space for a comfortable night's sleep. It allows you to stretch out and relax without feeling cramped.
  • If you're in search of a bed that your child can grow into, a full mattress is an excellent choice. It offers more room for them to enjoy as they grow older, ensuring it remains a comfortable and spacious sleep solution.

Other Standard Mattress Sizes

Queen Mattress

queen mattress

Queen Size Bed Dimensions - 60 X 80 inches

Minimum Recommended Room Size - 10 X 10 feet

Best for: Couples, Family of thre

King Mattress

king mattress

King Size Bed Dimensions - 76 X 80 inches

Minimum Recommended Room Size - 12 X 12 feet

Best for: Couples, Family of four, Pet parents

California King Mattress

california king mattress

California King Size Bed Dimensions - 72 X 84 inches

Minimum Recommended Room Size - 12 X 12 feet

Best for: Couples, Family of 3, Pet parents


In the end, it is up to you to decide which type of mattress best fits your sleeping habits and lifestyle. Neither size is definitively better than the other one, as both twin-sized and full-sized mattresses have advantages as well as drawbacks. Think about your needs and preferences before investing in a quality mattress that will last you years down the line. Whichever one you decide, make sure to read reviews and do research on the mattress before committing. Once you've picked that perfect fit, enjoy all the nights of sleepful rest!

natural and organic pillows


Twin or Full Mattress - Which is Better ?

The choice between twin and full mattresses depends on your specific needs. Twins are more space-efficient and ideal for kids and budget-conscious shoppers. Full mattresses offer more space for single adults or growing children.

How Much Bigger is a Twin than a Full?

A twin mattress is smaller than a full mattress. Twin size beds measure 38 inches wide and 75 inches long, while full beds measure 54 inches wide and 75 inches long.

What is the Difference Between a Full and a Double Bed?

In most cases, "full" and "double" are used interchangeably to refer to the same mattress size, which measures 54 inches wide and 75 inches long. There's generally no difference between them.

Related blog posts:

1. Mattress Sizes Chart and Bed Dimensions Guide

2. Full Bed vs Double Bed - Is there a difference

3. Twin Vs Twin XL Mattress Size Comparison

4. King vs. California King

5. Twin vs. Full vs. Queen Mattress Size Comparison

Disclaimer: What is said in this article has been referenced from multiple sources and is intended only for educational and informational purposes. Please note that no content in this article is a substitute for professional advice from a qualified doctor or healthcare provider. Always consult an experienced doctor with any concerns you may have regarding a health condition or treatment, and never disregard any medical suggestions or delay in seeking treatment because of something you read here.