Twin Mattresses

As the smallest bed size available in our online line-up it is a classic go-to for kids and single sleepers or for guest rooms, daybeds, and bunk beds.

Twin Sized Mattress Frequently Asked Questions

What size is a twin bed?

Approx. Dimensions: 38” x 74.5” / 2,831 sq in / 19.7 sq ft

Twin sizes are approximately 38” wide by 74.5” long, give or take a bit, which equates to approximately 2,831 square inches and 19.7 square feet.

Want to learn more about the different sizes we offer, check out our mattress size guide.

What's the difference between twin xl and twin sizes?

A twin is approximately 5 inches shorter than a twin XL, they are the same width.

Who should sleep on twin sizes? Can adults?

Standard twins are optimal for children and teens, especially those with limited bedroom space. As far as adults go, yes they can sleep on a twin, however it may feel too small for them to comfortably sleep on, therefore if space is an issue, we would recommend going with a Twin XL for an adult.

Is a twin big enough for 2 adults to sleep on?

While 2 adults could possibly fit on one, they wouldn’t be comfortable sleeping on it due to its limited width.

What size bed should come after a crib/toddler bed?

If your child's room is on the smaller side and they have outgrown their crib/toddler bed, we recommend the next step be a twin.

Should I buy a twin sized mattress online or in-store?

It all comes down to your personal preference. If you are an online shopper and love the convenience of buying and then receiving products right from the comfort of your own home, online is the way you should go. Also, Serta offers a 120 day in home trial plus free shipping. However, if you are someone that wants to try out the bed before you buy it and likes to talk through the product with a salesperson in real time, going to a mattress store might be the way you want to go.

Are twin beds also called single beds?

Yes, they are one in the same. They are just two different terms that describe the same size of mattress.

Do you ship internationally?

Directly on our website, we only ship within the United States, to the lower 48 states. At this time we do not offer shipping to Alaska or Hawaii.

Do you offer financing?

Financing is available directly through our website. We have partnered with Affirm to offer financing or pay-over-time options for our customers. At checkout, you will be given the option to pay through Affirm. If approved, you will be given loan options for 3, 6, or 12 months. All interest is provided up front, there are no hidden fees, and only a soft credit check is done through Affirm's system for approval. After you've confirmed your choice, you will be redirected back to our website to complete checkout.

Affirm only requests a soft credit check for approval, so the credit inquiry won’t affect your credit score. Once you've selected your financing term, you will be redirected back to the website to complete your purchase.

For returns and cancellations, refunds will be processed through Affirm and posted to your Affirm account. Refunds will be processed within 3-10 business days. Keep in mind the interest charge will not be refunded.

Please note that financing through Affirm is not available in West Virginia and Iowa.

Why buy Serta online?

120-Day In-Home Trial

Experience Serta in your home for up to 120 days. If you’re not completely satisfied, you can exchange or return it for a refund.

Read more


You should be able to rely on the quality of your rest night after night. That’s why every Serta® bed is backed by Serta’s 10-year limited warranty.

Read more

Free Shipping & Returns

All products ship free and feature free returns when you order directly from

Read more


All Serta beds are designed and assembled in the USA, leveraging our 85 years of manufacturing expertise.

Read more

certipur-us® certified

Rest easy knowing Serta uses only CertiPUR-US® Certified Polyurethane Foam.

Read more
Family, woman on the left, young son in the middle and man on the right laying on a mattress asleep

Try in stores

Want to test our products before you buy? Our Sleep Ambassadors will offer you a personalized, no-pressure in-store experience. Don't live near a Serta shop? Learn where else you can find us!

Join our email list

Sign up for new arrivals, special offers and tips for better sleep.

There was an error. Please try again.

Privacy Notice