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Twin XL Mattresses

(414 products)

Twin XL mattresses measure 38" wide × 80" long — the standard size for college dorms and a smart upgrade for taller sleepers who need length but not extra width. Browse our Twin XL collection in memory foam, hybrid, and innerspring, including options compatible with adjustable bed bases and split-king setups.

What Is a Twin XL Mattress?

A Twin XL is 5 inches longer than a standard twin, measuring 38" wide × 80" long. The width is identical — so it fits any twin bed frame that supports an 80" length — but the added length makes it appropriate for taller teens and adults without jumping to the wider and more expensive full or queen size.

One less obvious advantage: two Twin XL mattresses placed side by side equal the exact dimensions of a standard king mattress (76" × 80"). This makes Twin XLs the foundation of every split-king adjustable base setup, where each partner controls their side independently.

Who Should Buy a Twin XL Mattress?

● College students — Twin XL is the standard mattress size in most US dorm rooms. A standard twin is 5" too short for most dorm frames.
● Taller teenagers — Accommodates sleepers up to 6'6" without requiring an upgrade to a wider and costlier mattress.
● Single adults in narrow rooms — Same 38" width as a twin; still fits compact bedroom layouts.
● Adjustable base users — Two Twin XLs on a split-king base allow each partner to set their own incline, firmness, and position. Pair with a compatible adjustable foundation.
● Households anticipating growth — Buying a Twin XL for a growing teen means the mattress won't feel short two years later.

Twin XL vs. Twin — What's the Actual Difference?

Feature	Twin	Twin XL
Width	38"	38"
Length	75"	80"
Best for height	Under 6'0"	Up to 6'6"
College dorm standard	No	Yes
Split King compatible	No	Yes (2 × Twin XL = King)
Min. room size	7' × 10'	8' × 10'

If you're comparing the two and only need 75" of length, the standard twin mattress is typically priced lower. For anyone 6 feet or taller — or buying for college — the Twin XL is the clear choice.

What Types of Twin XL Mattresses Are Available?

● Memory Foam — Great for motion isolation in shared dorm settings; conforms to different sleep positions.
● Innerspring — Breathable and budget-friendly; responsive feel.
● Hybrid — Coil support with foam comfort layers; well-suited for adjustable base use.
● Latex — Naturally cooling and responsive; good for hot sleepers.

Setting Up a Twin XL Bedroom

Pair your Twin XL mattress with one of our twin bed frames — most twin frames accommodate both standard twin and Twin XL mattresses, but always verify the length before purchasing. For a complete dorm or compact bedroom, our twin bedroom sets include coordinated nightstands and dressers that scale well with a Twin XL layout.

Building a split-king? You'll need two Twin XL mattresses plus a split-compatible king bed frame and individual adjustable bases. Browse our king mattresses if you prefer a single mattress on a standard king frame.