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Twin XL Vs. Full Size Mattress: What Is The Difference?

By: S I
Updated on: April 05, 2024

When it comes to choosing the right mattress size, factors like comfort, space, and room dimensions play a significant role. The debate between twin xl vs. full size mattresses is a common dilemma for many consumers. Both sizes have distinct characteristics that cater to different needs and preferences. Twin XL mattresses are known for their space-saving nature, making them a popular choice for smaller bedrooms and dormitories.

On the other hand, Full-size mattresses offer a bit more room to stretch out, making them suitable for growing teenagers or single adults. Understanding the differences between these two sizes goes beyond just their dimensions; it’s about finding the perfect fit for your sleeping habits and lifestyle. In this article, we will delve into the nuances of Twin XL and Full-size mattresses, helping you decide to sleep a restful night.

Twin XL vs. Full Size Mattress Comparison

The twin XL mattress measures 38 inches in width and 80 inches in length, while the full-size mattress spans 54 inches in width and 75 inches in length. This variation in dimensions results in the full-size mattress being 16 inches wider but 5 inches shorter than the twin XL. The twin XL is commonly chosen by solo sleepers, whereas the full-size mattress caters to two sleepers or a couple, offering its greater width for enhanced comfort.

ParametersTwin XLTwin XL
Length80 inches75 inches
Width38 inches54 inches
Surface Area3040 sq. inches4050 sq. inches
Price Range$600-$2500$500-$1500
Ideal Occupancy1 child/teen/adult1 adult or 2 people
Recommended Room Size8′ x 10′10′ x 12′
Ideal ForThose needing leg spaceThose desiring personal space

What is a Twin XL Size Mattress?

A Twin XL size mattress is a type of bedding that is designed to accommodate a single person sleeping. It is slightly larger than a standard Twin mattress but narrower than a Full mattress. The “XL” in Twin XL stands for “extra long,” indicating that this mattress size provides additional length compared to a standard Twin mattress.

The dimensions of a Twin XL mattress typically measure around 39 inches in width and 80 inches in length. This extended length is particularly useful for taller individuals, such as teenagers or adults, who require more legroom when sleeping.

Twin XL mattresses are commonly used in settings like college dormitories and residential spaces where space might be limited, but the extra length is preferred for comfort. It’s worth noting that bedding accessories, such as sheets and comforters, designed for Twin-sized beds might not fit a Twin XL mattress properly due to the difference in length.


  • Extra Length: 5 inches longer than a standard Twin, suitable for taller individuals.
  • Space Efficiency: Fits well in smaller bedrooms and dorm rooms.
  • Versatility: Can be used for single sleepers or combined to create a King size bed.
  • Easy Bedding: Regular Twin sheets and bedding can be used.
  • Cost-Effective: Generally more affordable than larger mattress sizes.
  • Ideal for Growing Kids: Provides room to grow without frequent replacements.


  • Limited Width: Narrower than larger mattress sizes, offering less space for movement.
  • Not Ideal for Couples: It can be too narrow for couples who want to share a bed comfortably.
  • Less Sleeping Space: Individuals who prefer more room to stretch out may find it insufficient.
  • Limited Comfort Options: Less variety in terms of firmness and materials compared to larger sizes.

What is a Full-Size Mattress?

A full-Size mattress, also called a Double mattress, is a standard mattress size typically designed to accommodate one sleeper. It provides more width and length compared to a Twin mattress but is smaller than a Queen or King mattress. In the United States, a Full-Size mattress usually measures approximately 54 inches in width and 75 inches in length (137 cm x 191 cm). These dimensions can vary slightly based on regional and manufacturer specifications.

Full-Size mattresses are commonly chosen for smaller bedrooms, guest rooms, or for individuals who prefer a more compact sleeping space. While they offer more room to stretch out than a Twin mattress, they might feel a bit snug for couples or individuals who like extra space while sleeping. When deciding on mattress size, it’s essential to consider your personal preferences and the available space in your bedroom.


  • Adequate Space: Offers enough room for a single sleeper.
  • Cost-Effective: Generally more affordable than larger mattress sizes.
  • Fits Standard Bedrooms: Easily fits into most standard bedroom spaces.
  • Versatile Bedding Options: Wide variety of bedding and accessories are available.
  • Comfortable for Adults: Provides comfort for most adults.
  • Ideal for Guest Rooms: Suitable for guest rooms and smaller spaces.
  • Better Movement: Offers more space for movement during sleep.
  • Easy Accessibility: Standard size means easy availability of sheets and accessories.


  • Limited Space: This can feel cramped for couples or taller individuals.
  • Not Suitable for Sharing: It may not provide enough space for two adults to sleep comfortably.
  • Limited Availability: Less common in some regions, leading to fewer options.
  • Less Room for Movement: Compared to larger sizes, the movement might be slightly restricted.

Factors to Consider When Choosing Between Twin XL and Full Size

Before making a decision between a twin XL or a full mattress, there are several crucial factors that warrant careful consideration. By delving into the distinctions between these mattress sizes, you can make an informed choice tailored to your preferences and needs.

Price Consideration

Your mattress selection is inevitably influenced by your budget. The twin XL mattress offers a more economical option, aligning better with tighter financial constraints. Conversely, the full-size mattress might lean slightly toward the pricier end of the spectrum.

It’s worth noting that price often reflects mattress quality and construction materials. Whether the mattress is crafted from coir, memory foam, or another specialized foam type impacts its overall cost. Additionally, specific medical conditions or sleep preferences might necessitate softer or firmer mattresses, underscoring the significance of budget alignment.

Height and Sleeping Comfort

The height of the sleeper plays a pivotal role in the twin XL versus full mattress decision. For taller individuals, the twin XL presents itself as the preferred option due to the extra legroom it affords. However, if the sleeper is of shorter stature, either mattress size could suffice, contingent on factors like room size, financial boundaries, and the presence of a sleep partner.

If you’re someone who sprawls while sleeping, a full-size mattress might mitigate the risk of falling off the bed. Comparatively, the twin XL furnishes slightly more legroom, catering to taller sleepers.

Room Size Consideration

Spatial constraints within your room warrant contemplation, especially if space-saving is paramount. In this context, a smaller room would benefit from a twin XL mattress. The dimensions distinguishing twin XL from full beds lie primarily in their length and breadth, elements that occupy substantial real estate in a room. This also dictates the mattress size suitable for your setting.

Conversely, if your room is of medium to large dimensions, your personal sleeping proclivities play a more prominent role. Opt for an XL mattress if you sleep straight or require specialized support. Conversely, if you’re inclined to twist and turn throughout the night, a full-size mattress might better accommodate your sleep dynamics.

Accessory Consideration

Accessories, which both enhance aesthetics and protect the mattress, constitute another facet to ponder. The market boasts an array of fitted and flat sheets catering to various preferences. Waterproof fitted sheets gain importance when catering to children’s use, effectively elongating the mattress’s lifespan. Flat sheets, often designed with intricate patterns, facilitate household decoration on special occasions.

The availability of accessories varies between full-size and twin XL mattresses. The market showcases a broader assortment of full-size mattresses, as they are more commonly favored by families due to their multi-sleeper capacity. Twin XL accessories, comparatively, are more limited.

Sleep Partner Dynamics

If you’re sharing your mattress with a sleep partner, their needs and preferences are paramount. A single-sized mattress isn’t suitable for accommodating multiple co-sleepers. Consequently, the number of sleepers must be considered when choosing your mattress size.

While a full-size mattress accommodates multiple sleepers comfortably due to its width, the same cannot be said for the twin XL. The latter offers ample length but might prove cramped for two tall individuals. Analyzing your sleep partner’s height and preferences is crucial to ensure restful sleep.

Ultimately, if you’re a solo sleeper, factors like mattress type, budget, legroom space, and room size come into play without the added dimension of a sleep partner’s needs. By comprehensively evaluating these considerations, you can confidently choose between a twin XL and a full mattress that aligns harmoniously with your unique requirements.

Making Your Decision: Which One is Right for You?

In conclusion, the choice between a Twin XL and a full size mattress depends on various factors, including your personal preferences, sleeping habits, room size, and budget. If you’re a taller individual or a college student with limited space, the Twin XL might be the perfect fit. On the other hand, if you have more room to spare or are accommodating couples, the full size mattress offers a comfortable and versatile option.


Are Twin XL and Full Size mattresses the same in length?

No, the Twin XL mattress is longer than the Full Size mattress. The Twin XL measures 39″ x 80″, whereas the Full Size measures 54″ x 75″.

Can the full-size mattress fit in a smaller bedroom?

While it’s possible to fit a full size mattress in a smaller bedroom, it’s essential to consider the available space for other furniture and movement.

Do Twin XL and Full Size mattresses require special bedding?

Twin XL and Full Size mattresses have specific bedding sizes available, ensuring a snug fit. However, full size bedding offers a broader range of options.

Is a full size mattress suitable for couples?

Yes, a full Size mattress can accommodate couples, but it might feel slightly snug compared to larger mattress options like Queen or King sizes.

Which mattress size is better for tall individuals?

Tall individuals would find the Twin XL mattress more comfortable, as it provides additional legroom compared to a full size mattress.

Can I use Twin XL and Full Size mattresses with adjustable bed frames?

Yes, both Twin XL and Full Size mattresses are compatible with adjustable bed frames, offering flexibility and personalized comfort.


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