Twin XL Mattresses
Longer in length than a regular Twin, the Twin XL mattress provides comfort and support that's ideal for dorm rooms, a split-King setup, or tall people with limited space.
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Serta Perfect Sleeper Pro Mattress Regular price $1,274.00-$3,174.00Regular priceUnit price per$1,499.00-$3,599.00Sale price $1,274.00-$3,174.00Sale -
Serta Classic Mattress Regular price $299.00-$999.00Regular priceUnit price per -
Serta Sleep to Go Hybrid Mattress in a Box - Parent Regular price $299.00-$699.00Regular priceUnit price per -
Perfect Sleeper Innerspring Mattress Regular price $1.00-$1,699.00Regular priceUnit price per -
Serta Sleep to Go Foam Mattress in a Box Regular price $219.00-$699.00Regular priceUnit price per -
Serta iComfortPro Mattress Regular price $1,174.00-$5,274.00Regular priceUnit price per$1,499.00-$5,699.00Sale price $1,174.00-$5,274.00Sale -
Serta Perfect Sleeper X Quilted Hybrid Mattress Regular price $774.00-$2,274.00Regular priceUnit price per$999.00-$2,599.00Sale price $774.00-$2,274.00Sale -
Perfect Sleeper Hybrid Mattress Regular price $899.00-$1,699.00Regular priceUnit price per -
Perfect Sleeper Sleep Excellence Regular price $1,499.99-$3,249.99Regular priceUnit price per -
Serta Perfect Sleeper X Hybrid Mattress Regular price $974.00-$2,274.00Regular priceUnit price per$1,199.00-$2,599.00Sale price $974.00-$2,274.00Sale -
Serta iComfort Mattress Regular price $774.00-$2,374.00Regular priceUnit price per$999.00-$2,699.00Sale price $774.00-$2,374.00Sale
Twin XL mattress frequently asked questions
What size is a Twin XL?
Approx. Size: 38” x 79.5” / 3,021 sq in / 21 sq ft
Twin XL sizes are approximately 38” wide by 79.5” long, give or take a ½ an inch, which equates to approximately 3,021 sq inches and 21 sq feet.
Want to learn more about the different sizes we offer, check out our mattress size guide.
What's the size difference between Twin XL and Twin sizes?
A twin is the same width but approximately 5 inches shorter than a twin XL.
Can two Twin XL beds be used to create the same size as a Queen or King mattress?
Yes, two twin XLs placed side by side will create the same size as a king. Also, two twin XLs make a split king.
What is a Split King?
A split king bed is composed of two twin XLs placed side by side on a single bed frame. While it has the same dimensions as a regular king, measuring 76 inches wide by 79.5 inches (give or take a ½ inch) long, the key difference is that it consists of two completely separate mattresses instead of one. This allows for customization and comfort preferences for each sleeper on their side of the bed.
Can a Twin XL mattress fit on a Twin-sized bed frame?
No, due to the slight difference in length, a twin XL mattress is not compatible with a standard twin bed frame as it will be too long.
Is Twin XL the same size as a Full bed?
No. A full size bed is 15 inches wider and a twin XL is longer by 5 inches.
Do you ship internationally?
When you purchase directly from our website, we only ship within the United States, to the lower 48 states. We do not offer shipping to Alaska or Hawaii at this time.
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.
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120-day trial
DetailsIf you’re not completely satisfied, you can exchange or return it for a refund.
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Free shipping and returns
DetailsAll products ship free and feature free returns when you order directly from Serta.com.
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Optional white glove delivery
DetailsHand delivered and setup in the bedroom of your choice. Plus removal of your old mattress.
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10-year limited warranty
DetailsYou should be able to rely on the quality of your rest. That’s why every Serta® bed is backed by our hassle free warranty.
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Monthly financing with Affirm
DetailsQuick, simple financing options with Affirm. Apply at checkout.
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