Twin XL vs Full Mattresses: Size and Comparison Guide

Full-size mattresses used to be the go-to mattress for guest rooms and couples, but living spaces have evolved and sleep preferences have changed, causing the demand for more spacious options is on the rise. This shift has placed the spotlight on twin XL mattresses, offering greater length and flexibility for a variety of situations.

Does a Full Mattress Still Make Sense?

Full-sized mattresses, often called "doubles," have long been the go-to choice for a reason. They offer a balance between the compactness of a twin and some of the spaciousness of larger beds.

The traditional full mattress occupies a unique niche – wider but shorter than a twin XL, yet smaller all around than a queen. However, for many, this ends up feeling like a compromise on both space and comfort.

As we compare the full and twin XL size beds, discover why many sleepers like you often find a queen size mattress may be a contender as well.

Mattress Size by Dimensions

Twin XL: Width: 38" x 80" (3.2ft x 6.67ft)
Full: Width: 53" x 75" 3.2ft x 6.25ft)
Queen: Width: 60" x 80" (5ft x 6.67ft)

The Middle Ground Dilemma: When Does a Full Mattress Make Sense?

While less popular overall, there are a few scenarios where a full-size mattress might still be the most practical choice:

Guest Rooms: If space is a major concern and you only have guests occasionally, the full offers a slight upgrade from a twin without taking up as much room as a queen. It can also accommodate two people, whereas twins typically only fit one.
Very Tight Spaces with Shared Sleep: For couples with extremely limited bedroom layouts, a full might be the only way to accommodate two people. However, it’s important to acknowledge the potential for cramped sleep. Especially if the sleepers are close to 6ft tall.
Budget & Convenience First: Full mattresses tend to be less expensive than queens and can often be found on sale due to their lowering popularity. If your primary goal is a functional bed upgrade on a tight budget, a full bed could be a solution.

Before settling on a full mattress, it's crucial to consider if a twin XL or a more spacious queen might ultimately be a better investment for your comfort and long-term needs.

The Rise of Alternatives:

Why the Twin XL Mattress Often Wins

Here's where the twin XL often offers more advantages than a full:

Solo Sleepers Craving Space: If you value room to spread out without needing the full width of a queen, the twin XL strikes a balance between comfort and a smaller footprint.
Taller Individuals: The extra 5 inches of length make a world of difference for anyone close to 6 feet, providing essential legroom and preventing feet from dangling.
Guest Room Upgrade: Offer your guests more comfort than the standard "double" bed. They'll appreciate the extra length, especially if they're on the taller side.
Long-Term Potential: Two twin XLs can create a split king, offering flexibility for future needs and the possibility of customized comfort levels for couples.

When the Queen Mattress Reigns Supreme

Couples Prioritizing Comfort: The queen provides significantly more space for two people to sleep comfortably, minimizing movement disturbances throughout the night.
Larger Bedrooms: If space isn't a major limitation, a queen offers a luxurious sleep experience without feeling oversized for a standard bedroom.
Guest Bedrooms: Those who want to offer greater space and comfort for their guests (especially guest couples) typically go for the queen sizing, assuming the bedroom allows for the size.

Cost, Mattress Type, and Other Considerations

Choosing the right mattress size involves balancing various aspects. Consider these points before your final decision:

The Cost Factor:

Twin XL Mattresses: A small upgrade in price over traditional twins, but often more affordable than larger sizes.
Full Mattresses: A middle ground price-wise, but remember it won't be a significant cost saver compared to a queen.
Queen Mattresses: The most expensive option in most cases, but the investment in comfort might be worth it.

How Mattress Type Plays a Role:

Material and Construction Impact Price: Foam mattresses tend to be more affordable, while hybrids and those with advanced cooling technology can be pricier across all sizes.
Don't Sacrifice Comfort for Size: Ensure your preferred mattress type is available and supportive in your chosen size before making a decision.

Additional Factors to Weigh:

Sheet Availability: Twin XL sheets are widely available, full and queen offer more variety.
Room Size Restrictions: Double-check measurements to ensure your chosen mattress and bed frame will fit comfortably.
Long-Term Needs Could you see yourself needing the flexibility offered by two twin XLs in the future?

Decision Time – Key Questions and Trade-Offs

Your Priorities Checklist:

Will the bed be primarily for solo or shared sleep?
How often will the bed be shared?
Is maximizing sleeping space more important than overall room space?
Does my room comfortably accommodate the larger size I'm considering?
Are you taller than average and need the extra length?
What budget range are you aiming to stay within?
Is there potential for needing two beds to combine into a king in the future?

Twin XL vs. Full Mattress FAQs

Are twin XL mattresses harder to find than full sizes?
Twin XLs are very common and available in a wide range of styles and firmnesses. You might have slightly less design choice in sheets compared to a full, but overall availability isn't an issue.
I'm tall. Is a full mattress long enough?
For most people over 6 feet tall, a twin XL and queen beds offer vastly improved sleeping comfort compared to a full mattress. With fulls only being 6.25 ft in length, it doesn’t leave a lot of room for pillows and gaps, often leading to dangling feet.
Is there a big price difference between a twin XL and a full mattress?
Full size mattresses are usually slightly more expensive than twin XLs.
Can I use my existing full-size bed frame with a twin XL?
Twin XL's added length requires a compatible frame. Check if your existing bed frame can be adjusted or if a new one is needed.
Isn't a full mattress big enough for two people?
Technically yes, but many couples find full mattresses too cramped for comfortable long-term sleep. Queen mattresses are a typical standard for couples. Learn how to choose the best mattress for couples.

Next Steps: Finding Your Ideal Sleep Space

The decision between a twin XL and full mattress ultimately comes down to your individual needs. If you're a tall sleeper, crave extra space, or envision potentially combining two beds in the future, a twin XL often offers the best blend of comfort and practicality. If shared sleep in a compact room is your primary concern, a full size mattress might be the right fit, but be aware of potential comfort limitations and other alternatives like queen mattresses that may be a better fit.

Ready to Find Your Perfect Mattress?

Discover Your Ideal Fit: Take our SleepMatch Quiz and get personalized recommendations based on your sleep style and preferences.
Experience the Difference: Visit one of our convenient showrooms to try out various mattress sizes and firmness levels in person.
Explore Your Options: Browse the mattresses we suggest for each size: twin X mattresses, full mattresses, queen mattresses, and other mattress size options to suit your needs and budget.