Twin XL Mattresses

Shop award-winning twin XL size foam mattresses for great sleep, at an even greater price.

Graphic illustration of the dimensions of different size mattresses. Graphic illustration of the dimensions of different size mattresses.

How big is a twin size mattress?

A twin size mattress is 75 inches long and 38 inches wide, while a twin xl mattress is 80 inches long and 38 inches wide.

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Graphic illustration of a TwinXL bed. Dimensions are 38" x 80" or 96.5 cm x 203 cm. Graphic illustration of a TwinXL bed. Dimensions are 38" x 80" or 96.5 cm x 203 cm.

Twin XL

Dimensions: 38” x 80”

The twin’s slightly longer cousin, the twin XL mattress, is the most popular size for college dorm rooms. It measures five inches longer than a twin, at 38 inches wide and 80 inches long. In addition to students, XL twin beds are a good solution for taller teenagers and individual adults with limited space. These beds can also be put together if you’re choosing a split king adjustable base for full body adjustability!

Mattress Sizing Chart

Twin Mattress - 38" x 75" : Often found in kid's rooms and studio apartments.
Twin XL Mattress - 38" x 80": Often found in college dorm rooms and studio apartments
Full Mattress - 53" x 75": Often found in guest rooms.
Queen Mattress - 60" x 80": Often found in master bedrooms.
King Mattress - 76" x 80": Often found in extra large master bedrooms.
California King Mattress - 72" x 84": Often found in extra large master bedrooms, perfect for gathering the family.

Supreme comfort for truly astonishing sleep

Casper's Twin XL foam mattresses delivers cloud-like softness and support you’ll never want to go without. At 38 in wide and 80 in long, it’s 5 in longer than a standard Twin. You can combine two Twin XL mattresses on a standard King-size bed frame.

A father tucks his child into bed. A father tucks his child into bed.

Cooler sleep, better sleep

Casper Twin XL mattresses are built from breathable memory foam that allows excess heat to escape. Staying cool at night is essential for deep, rejuvenating sleep - and it’s made possible with the premium-quality, proprietary Casper foam.

Who Should Get a Twin XL Size Bed?

A Treat for the Tall

The Casper Twin XL is 80 inches long - nearly half a foot longer than a standard Twin.

Golden for Guest Rooms

With its cozy dimensions, the Twin XL is the best mattress for tucking away in a kid’s room or guest bedroom.

Very Versatile

Use the Twin XL mattress alone, or combine two for a king-sized mattress experience.

A couple sitting up on their bed and stretching. A couple sitting up on their bed and stretching.

Certified safe for you and the environment

Our Casper Twin XL size mattress is manufactured from safe, non-toxic materials. All of our foams are CertiPUR-US® certified, meaning they’re made without ozone depleting chemicals and regulated by the Consumer Product Safety Commission Low VOC.
Close-up image of one person's arm and another person's feet resting comfortably on a mattress. Close-up image of one person's arm and another person's feet resting comfortably on a mattress.

Free shipping. Free returns. Hassle not included.

Order your Twin XL mattress, and it’ll be on your doorstep within a few days. Try sleeping on it for up to 100 nights. If you don’t love it, and give you a full refund anytime after the 30-Night Adjustment Period.

Twin XL Hybrid Mattresses

Discover the pinnacle of luxury and convenience with our Twin XL size hybrid mattresses. Fusing the adaptable resilience of coil springs with the rich softness of memory foam, these mattresses are designed to align with your body while providing gentle elevation. Our thoughtful design emphasizes fluid air circulation, guaranteeing a cool sleep. Dive in below and experience the perfect amalgamation of comfort, support, and advanced cooling – all crafted to enhance your sleep experience.

Our best selling Hybrid Mattress is available in Twin XL Size.

Our hybrid mattress collection combines the pressure relief of our original foam mattress with the added lift from resilient springs.

A person lies on their side near the corner of a Casper Snow Max mattress. A digital illustration placed on the image shows that this mattress has a Medium Soft feel, slightly more soft than it is firm. A person lies on their side near the corner of a Casper Snow Max mattress. A digital illustration placed on the image shows that this mattress has a Medium Soft feel, slightly more soft than it is firm.

Snow Max

Our ultimate cooling hybrid mattress. Engineered with precision-cut foam and encased coils for a breathable and supportive medium-soft feel and Snow Technology for 12+ hours of cooler sleep.
Close-up of front side of a Casper Dream Max mattress. A couple is sitting near the edge of the bed behind the name tag. A digital illustration placed on the image shows that this mattress has a Medium Soft feel, slightly more soft than it is firm. Close-up of front side of a Casper Dream Max mattress. A couple is sitting near the edge of the bed behind the name tag. A digital illustration placed on the image shows that this mattress has a Medium Soft feel, slightly more soft than it is firm.

Dream Max

Our ultimate hybrid mattress with precision-cut foam and encased coils. Engineered with a gooey yet supportive medium-soft feel perfect for any sleep style—especially side sleepers.
Front-facing image of a Casper Dream mattress. A couple is seen sitting on their bed behind the name tag. A digital illustration placed on the image shows that this mattress has a Medium feel between firm and soft. Front-facing image of a Casper Dream mattress. A couple is seen sitting on their bed behind the name tag. A digital illustration placed on the image shows that this mattress has a Medium feel between firm and soft.

Dream

Combines the best of both worlds with resilient springs as the base for added lift and our proprietary foam for pressure relief. The "just right" feel is now even better.

Twin XL Size Memory Foam Mattresses

Discover restful tranquility with our twin size memory foam mattresses. Skillfully crafted using state-of-the-art memory foam solutions, each mattress acts as a gateway to a realm where the contours of your body are gently supported, alleviating the strains of the day. Our memory foam options present an ambient sleep atmosphere, achieving a harmonious mix of softness and cool air circulation. Browse further to find a sanctuary of sleep that resonates with your individual comfort preferences.

Which Casper Twin XL Memory Foam Mattress is right for you?

Whether you’re looking for luxurious extra thickness or a more streamlined sleeping experience, there’s a Casper twin XL mattress for you.

Close-up of the front side of a Casper One mattress. A person is seen resting on the mattress behind the name tag. A digital illustration placed on the image shows that this mattress has a Medium Firm feel, slightly more firm than it is soft. Close-up of the front side of a Casper One mattress. A person is seen resting on the mattress behind the name tag. A digital illustration placed on the image shows that this mattress has a Medium Firm feel, slightly more firm than it is soft.

The One

The One was engineered using feedback and data from customers like you. If sleeping on a cloud sounds good, consider this your sweet spot.
Casper Cloud One mattress. A graphic on the image indicates that this mattress has a medium-soft feel. Casper Cloud One mattress. A graphic on the image indicates that this mattress has a medium-soft feel.

Cloud One

Featuring the all-new patent-pending Casper Core+™, The Cloud One offers a boost of plushness while giving you all the support and breathability of The One.

Memory Foam vs. Hybrid Twin XL Size Mattresses

Twin XL memory foam mattresses stand out for their outstanding body-adaptive qualities and movement segregation, ensuring each sleeper feels nestled all night. These offer a sleep experience tailored to your body, enhancing pressure point relief.

On the other hand, hybrid mattresses take things up a notch by combining the unrivaled plushness of memory foam with the durable bounce of springs. This synergy results in a mattress that provides the warm embrace of memory foam while delivering improved air circulation, premium edge reinforcement, and a touch of bounce.

Interested in diving deeper? Explore our detailed memory foam vs. hybrid mattresses guide.

Frequently asked questions

How Casper keeps prices low and quality high

When Casper was founded in 2014, many people were skeptical. Would consumers really buy a standard king size mattress without testing it first? Several years and numerous awards later, we have an answer: It turns out no one likes visiting stuffy mattress showrooms to make high-stakes purchases under the scrutiny of needy salespeople. (Who knew??)

Everyone loves the ease and convenience of buying online from a trusted source, and having a high-quality mattress shipped in a box to their doorstep. And people keep spreading the word that our mattresses deliver unparalleled comfort and support, top-notch construction quality, and high-tech, innovative design.

But the Casper experience isn’t just about quality, trust, and transparency. Our mattresses are a mere fraction of other brands’ prices. That’s because we’ve flipped the mattress industry on its head. By eliminating showrooms and middlemen, we keep our costs low - and pass those savings on directly to you.