What Is a Full XL Mattress Size? Measurements, Fit, and FAQs
If you’re wondering “What Is a Full XL Mattress Size” and how it compares to other mattress sizes, you’re not alone. Full XL is a less common size, and its dimensions, benefits, and best uses can be confusing at first glance. This guide explains exactly what a Full XL mattress is, how big it is, and whether it might be the right fit for your space and sleep needs.
What Is a Full XL Mattress Size?
A Full XL mattress is a longer version of a standard Full (also called Double) mattress.
- Full size: 54" wide x 75" long
- Full XL size:54" wide x 80" long
So, a Full XL mattress is typically 54 inches wide and 80 inches long. The extra 5 inches of length make it similar in length to a Queen or King mattress, but it keeps the same width as a standard Full.
In short: A Full XL is a narrower, longer mattress designed for taller sleepers who want more legroom without using as much floor space as a Queen.
How Does a Full XL Compare to Other Mattress Sizes?
Understanding what a Full XL mattress size is is easier when you see how it compares to other common sizes:
| Mattress Size | Width x Length (inches) | Notes |
|---|---|---|
| Twin | 38" x 75" | Narrow, shorter length |
| Twin XL | 38" x 80" | Narrow, extra length |
| Full | 54" x 75" | Wider than Twin, standard length |
| Full XL | 54" x 80" | Full width with extra length |
| Queen | 60" x 80" | Wider than Full XL, same length |
A Full XL:
- Has the same length as a Queen
- Is 6 inches narrower than a Queen
- Is 5 inches longer than a regular Full
Who Is a Full XL Mattress Best For?
A Full XL mattress can be a good fit for certain sleepers and room setups:
- Taller individuals who find their feet hanging off a standard Full
- Single adults who want more length but don’t need the extra width of a Queen
- Guest rooms where floor space is limited but comfortable length is still important
- Shared rooms or studio apartments where every inch of width matters
However, a Full XL is usually best for one person. Two adults may find the 54-inch width too narrow to share comfortably over time.
Is It Hard to Find Full XL Bedding and Bed Frames?
One common concern when people ask “What Is a Full XL Mattress Size” is whether accessories are easy to find.
- Bed frames: Many frames that adjust for Full and Queen sizes may not list Full XL, but some adjustable or platform frames can accommodate the 80" length.
- Sheets and bedding: Full XL–specific sheets and mattress protectors are less common than Full or Queen, but they do exist.
- Workaround: Some people use Queen-length flat sheets with a Full XL mattress, though fitted sheets usually need to be Full XL–specific for a snug fit.
If simplicity and broad availability of bedding are a priority, this is worth keeping in mind.
How Much Space Does a Full XL Need in a Room?
Because a Full XL is the same length as a Queen, plan your layout as you would for a long mattress:
- Mattress footprint: 54" x 80"
- Ideal minimum room size: often around 9' x 10' or larger, depending on furniture
- Allow space for:
- Walking paths around the bed
- Nightstands, dressers, or desks
- Doors and drawers to open comfortably
In small rooms where a Queen feels too wide, a Full XL can provide similar legroom with a smaller footprint.
Full vs. Full XL: How Do I Decide?
If you’re choosing between a Full and a Full XL, consider:
- Your height:
- If you’re taller or your feet reach the edge of shorter beds, the extra 5" in a Full XL can feel more comfortable.
- Your room length:
- If adding 5 inches of length would block doors, windows, or walking space, a standard Full might fit better.
- Availability of bedding:
- Full sheets and accessories are more common. Full XL options are available but may require a bit more searching.
A helpful rule of thumb:
If you need more legroom but don’t have space for a Queen, a Full XL is worth considering.
✅ Quick Mattress Takeaways
Key points consumers should understand about “What Is a Full XL Mattress Size”
- Dimensions: A Full XL mattress is 54" wide x 80" long.
- Compared to Full: Same width as a Full, 5 inches longer.
- Compared to Queen: Same length as a Queen, but 6 inches narrower.
- Best for: Taller single sleepers, guest rooms, and smaller spaces needing extra length.
- Sharing: Generally better for one person than for couples due to the 54" width.
- Room planning: Treat it like a Queen in terms of length requirements.
- Bedding & frames: Full XL accessories exist but are less common than Full or Queen.
Understanding What Is a Full XL Mattress Size—its exact dimensions, how it compares to other sizes, and where it fits best—can make it easier to choose a mattress that matches both your body and your bedroom layout.
