Size
Twin XL
38 × 80 in
Commonly listed at 38 by 80 inches: twin width, queen length. That combination is why it exists, and it is also why so few sets are cut for it. When a household has one Twin XL and one twin, the two sets are not interchangeable and they look identical folded.
Depths stated for Twin XL in this catalog
2 of the 4 items in the catalog cut for Twin XL state a depth on their listing. The figures below are what the sellers wrote, not what was measured here, and they are grouped by what part of the stack each item grips.
| Item | Layer | What the listing states | Deepest figure given |
|---|---|---|---|
| Bare Home 1800 Sheet Set, Twin XL | Sheet & Pillowcase Sets | 6 to 15 in | 15 in |
| BEDLORE Waterproof Protector, Twin XL | Mattress Protectors | 6 to 15 in | 15 in |
What Twin XL gets confused with
Twin
Identical width, five inches of difference in length. This is the single most common bedding mismatch there is. Label the bag, because a folded fitted sheet gives you no way to tell them apart.
Two Twin XLs sold as a split king
A king-size adjustable base is often two Twin XL platforms side by side, which means it takes two Twin XL fitted sheets and one king-size comforter. A king fitted sheet will not work on it if the halves move independently.
A dorm listing that just says extra long
Extra long is a description and not a size name. Check that the listing states 80 inches of length rather than assuming it, because some listings use the phrase loosely.
Everything here cut for Twin XL
- Bare Home 1800 Sheet Set, Twin XLin Sheet & Pillowcase Sets
- HEVUMYI Comforter Set, Twin XL, 5 piecesin Comforter Sets
- BEDLORE Waterproof Protector, Twin XLin Mattress Protectors
- SINWEEK 3 Inch Gel Memory Foam Topper, Twin XLin Mattress Toppers
To add your own layers up and see what pocket depth the result needs, use Pocket Check. To see the other four sizes side by side, go to Sizes.
Where this comes from
What is federally regulated about a mattress is how it behaves in a fire, not how big it is. These are the rules that do exist.