Mattress sizes
Twin XL Mattress Dimensions
Quick answer
A Twin XL mattress measures 38 inches wide by 80 inches long (97 by 203 cm), which is 21.1 square feet of sleeping surface. It is sized for one sleeper.
The twin xl is a standard US mattress size, which means every manufacturer builds it to the same 38 by 80 inch footprint. The numbers that actually decide whether it works in your bedroom are the room it needs and the height it ends up at, both of which are below.
What are the exact twin xl mattress dimensions?
| Measurement | Inches | Centimetres | Feet |
|---|---|---|---|
| Width | 38 | 97 | 3.2 ft |
| Length | 80 | 203 | 6.7 ft |
| Sleeping area | 3,040 sq in | 19,691 sq cm | 21.1 sq ft |
| Width per sleeper | 38 in | 97 cm | 3.2 ft |
Industry standard
These are standard published dimensions, the same across manufacturers.
How much room does a twin xl bed need?
Add about 3 inches of frame on each side, then the walking clearance you want. The convention is 24 inches to squeeze past and 30 or more to be comfortable.
| Clearance on each side | Room width needed | Room length needed |
|---|---|---|
| 24 in | 92 in (7.7 ft) | 110 in (9.2 ft) |
| 30 in | 104 in (8.7 ft) | 116 in (9.7 ft) |
| 36 in | 116 in (9.7 ft) | 122 in (10.2 ft) |
Convention, not a standard
This is widely repeated guidance rather than a measured standard. Treat it as a starting point.
Assumes a frame about 3 inches wider than the mattress on each side, clearance on both sides and at the foot, and the headboard against a wall. Check yours with Room Size and Clearance Calculator.
How does a twin xl compare to other mattress sizes?
| Size | Width (in) | Length (in) | Area (sq ft) | Standard size |
|---|---|---|---|---|
| Twin XL (this page) | 38 | 80 | 21.1 | Yes |
| Twin | 38 | 75 | 19.8 | Yes |
| Full (Double) | 54 | 75 | 28.1 | Yes |
| Full XL | 54 | 80 | 30 | Yes |
| Queen | 60 | 80 | 33.3 | Yes |
| Olympic Queen | 66 | 80 | 36.7 | No |
| Short Queen (RV) | 60 | 75 | 31.3 | No |
Industry standard
These are standard published dimensions, the same across manufacturers.
Which mattresses come in twin xl?
Every mattress below publishes twin xl as its size. Prices change often.
Novilla Twin XL Mattress
$96.998 inch twin xl memory foam.
Check price on Amazon
NapQueen 8 Inch Twin-XL Size Mattress
$117.008 inch twin xl memory foam.
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Zinus 12 Inch Twin XL Green Tea Memory Foam Mattress
$198.6712 inch twin xl memory foam, medium firm feel as the maker describes it.
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LETMOON Twin XL Mattress
$209.9912 inch twin xl hybrid.
Check price on AmazonFrequently asked questions
What are the dimensions of a twin xl mattress?
A twin xl mattress measures 38 inches wide by 80 inches long, or 97 by 203 centimetres. That works out to 21.1 square feet of sleeping surface. This is a standard US size, so it is the same from every manufacturer.
How big a room does a twin xl bed need?
For comfortable movement, allow the mattress plus about 3 inches of frame on each side plus 30 inches of walking clearance. For a twin xl that means roughly 104 inches of room width and 116 inches of length. You can get away with 24 inches of clearance, but a nightstand will crowd it.
What size sheets fit a twin xl mattress?
Buy sheets labelled twin xl. The fitted sheet also has to clear the depth of the mattress, so check the pocket depth separately: standard pockets fit up to 12 inches, deep pockets 13 to 17 inches, and extra deep pockets 18 to 22 inches. A topper adds its full thickness to what the sheet must clear.
Is a twin xl long enough for a tall person?
A mattress should be about 4 to 6 inches longer than the tallest sleeper. At 80 inches, a twin xl suits someone up to roughly 76 inches tall, which is 6 feet 4 inches. Above that, look at an even longer specialty size.
Does twin xl refer to thickness as well?
No. Size describes only the width and length. Thickness is separate and ranges from about 6 inches to over 16, with 9 to 12 inches counting as standard. Thickness changes the total height of the bed and the sheet pocket depth you need, but it never changes the 38 by 80 inch footprint.
How to read the numbers on this page. Standard mattress and bedding dimensions are industry-wide and the same across manufacturers. Guidance like replacement intervals, firmness by body weight and walking clearance is convention rather than a measured standard, and every table here says which it is. Where a manufacturer does not publish a figure we leave it out instead of estimating. This is not medical advice: a mattress is not a treatment for a medical condition, and persistent pain is a reason to see a clinician.