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Twin Mattresses

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

15% OFF

Original Hybrid

Price: $1,095 Sale Price: $930.75
Firmness: Medium
Our top-rated mattress with enhanced airflow.
Ergonomic Support
Firm Support
Cooling Technology
Advanced Cooling
15% OFF

The Casper

Price: $595 Sale Price: $505.75
Firmness: Medium-Firm
For comfortable sleep at a cozy price.
Ergonomic Support
Average Support
Cooling Technology
Advanced Cooling
15% OFF


Price: $895 Sale Price: $760.75
Firmness: Medium-Firm
Our most popular mattress for better sleep.
Ergonomic Support
Firm Support
Cooling Technology
Advanced Cooling
Mattress Size Chart
Twin: 38 inches by 75 inches; Twin XL: 38 inches by 80 inches; Full: 53 inches by75 inches; Queen: 60 inches by 80 inches; King: 76 inches by 80 inches; California King: 72 inches by 84 inches

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

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.

The Casper Twin isn't actually made of clouds. We promise.

Twin mattresses are one of the world’s most popular mattress sizes. They’re just right for kids and teenagers and make amazing daybeds. The Casper twin is our smallest mattress, but it delivers the same cloud-like sleep as its larger cousins.

Award-winning design for years of sleepy bliss

Our twin size mattress is built from premium foams and fabrics, and is certified safe for you and the environment. And like every Casper mattress, it’s protected by an outstanding 10-year limited warranty¹. That’s a lot of naps.

Unbeatable 100-night free trial

Returns are always free with Casper. And if you don’t love your new twin size mattress, just let us know within 100 days. We’ll pick it up and give you a full refund anytime after the 30-Night Adjustment Period.

Contouring memory foam with 'just right' support

We use multiple layers of high-tech memory foam to gently hug your body while cradling your weight, relieving pressure and stress. If you’ve never slept on a cloud before, you’re in for a treat.

Our best selling Hybrid Mattress is available in size Twin.

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

The Original Hybrid
Original Hybrid Mattress

The Original Hybrid

Our award winning Original mattress, upgraded. The Original Hybrid 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.

Which Casper Twin 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 size mattress type for you. Here are two options to choose from in our twin memory foam mattress collection:

The Original
The Original

The Original

Our award winning Original king bed was engineered using feedback and data from customers like you. If sleeping on a cloud sounds good, consider this your sweet spot.

The Casper
The Casper Mattress

The Casper

The Casper delivers Casper's signature "just right" feel (not too firm, not too soft) while keeping you cool and comfortable at a lower price.

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.

Frequently Asked

Standard twin bed mattress dimensions measure 38 inches wide and 75 inches long. The compact size of this single bed makes it an easy pick for children’s bedrooms, college dorm rooms, and other tight spaces.

Typically, twin mattress prices range from $300 to $1,400. The price depends on the quality and added features—materials, layering, cooling technology, and waterproofing all add up to a higher dollar amount. The mattress type can also affect the cost– whether it's a memory foam mattress, hybrid mattress, and so on.

The most important thing when looking at prices is to find the highest quality for that price point. Casper’s affordable Element twin mattress provides simple yet pleasing comfort, while the Wave Hybrid twin mattress adds memory foam and cooling gel layers for luxurious rest and the best support. Your twin bed in a box will quickly make for a stylish, sturdy, and space-saving bedtime experience.

twin XL mattress is a comparable bed to a twin mattress but the main difference is that a twin XL has an added 5 inches of length and therefore measures 38 x 80 inches altogether. You’ll also find this type of twin size mattress in college dorms, as well as some apartment and condominium bedrooms.

Learn more in our guide on Twin vs Twin XL.

By standard measurements, a full-size mattress, or double bed, is 53 inches wide and 75 inches long. This means that compared to a standard twin size bed —35 x 75 inches—a full mattress adds 15 inches of width to your sleeping space but no extra length.

For a single sleeper, a full bed’s extra wiggle room might provide a comfier rest or better fill out a larger bedroom. However, both sizes work for a solo sleeper.

Learn more in our guide on Full vs Twin.

A twin bed may feel too cramped for an adult to sleep comfortably in, therefore a different mattress size, like a twin xl or full may be better. However, it all depends on your sleeping needs and living space.

Historically, twin beds weren’t made for the average adult. They were sold in pairs for children’s rooms, hostels, and other co-living spaces. While twin beds work well for kids, they tend to be too small for grownups, especially larger individuals and restless sleepers.

For very small bedrooms, however, a twin bed may be necessary to save space. In that case, the least you can do to maximize your comfort is to upgrade to a Casper twin mattress in a box.

Most bunk beds are designed for twin mattresses, so the answer is usually yes— it makes for a great bunk bed mattress size! However, some bunk bed models accommodate a twin XL mattress (38 x 80 inches), and others have varied upper and lower bunks, usually with a twin on top and a double bed on the bottom. Before purchasing, make sure to double-check all bed frame dimensions.