What Size Is Full Mattress In Inches? Exact Dimensions and Helpful FAQs
If you’re asking “What Size Is Full Mattress In Inches?”, you’re likely measuring a bedroom, buying new bedding, or deciding if a full will be big enough for one or two sleepers. This FAQ-style guide explains the standard full mattress dimensions in inches and answers the most common follow-up questions.
What size is a full mattress in inches?
A standard full mattress (sometimes called a “double”) typically measures:
This is the most commonly accepted full mattress size in the mattress industry.
In feet, that’s about 4.5 feet wide by 6.25 feet long.
How does a full mattress compare to other mattress sizes?
Understanding how a full fits into the size lineup can help you judge if it’s right for your space.
| Size | Width (inches) | Length (inches) | Typical Use |
|---|---|---|---|
| Twin | 38" | 75" | Children, teens, small guest rooms |
| Twin XL | 38" | 80" | Taller teens, college dorms |
| Full | 54" | 75" | Single adults, cozy couples, guest rooms |
| Queen | 60" | 80" | Most couples, primary bedrooms |
| King | 76" | 80" | Couples wanting extra space |
A full is 16 inches wider than a twin, but the same length as a twin. Compared to a queen, a full is 6 inches narrower and 5 inches shorter.
Is a full mattress big enough for two people?
Technically, two people can share a full mattress, but space will be limited. Each person gets about 27 inches of width, which is similar to the width of a crib mattress per person.
Common experiences:
- Good fit: Single adults, teenagers, or one sleeper plus a small pet.
- Tight fit: Two adults who prefer extra personal space or move around during sleep.
- Occasional fit: Short-term stays in guest rooms or small apartments.
If you and a partner like to stretch out or are taller, you may want to compare a full vs. queen before deciding.
Does the mattress thickness change the size in inches?
The listed full size (54" x 75") refers only to width and length.
Thickness (height) can vary widely, often from around 6 to 14 inches or more, depending on construction.
When checking “What Size Is Full Mattress In Inches?”, keep in mind:
- Width and length are standardized at 54" x 75" in most cases.
- Height is not standardized, so fitted sheet depth and bed frame style matter.
Are there different types of full mattress sizes?
While 54" x 75" is the standard, you may occasionally see variations such as:
- Full XL: Often listed around 54" x 80" – same width as a full, length of a queen/twin XL.
- Custom or RV sizes: Some mattresses for RVs or specialty frames can be slightly shorter or narrower than a standard full.
If you’re not sure, check both the frame measurements and the mattress dimensions in inches before buying bedding or accessories.
How much space does a full mattress take up in a room?
Knowing What Size Is Full Mattress In Inches helps you plan your layout.
- Mattress footprint: 54" x 75"
- With a simple bed frame, add a few extra inches to each side for the frame and headboard.
As a general guideline, a full mattress works well in:
- Smaller bedrooms where a queen might feel crowded
- Studio apartments needing a balance between bed size and floor space
- Guest rooms that host one or two sleepers occasionally
Leaving at least 24–30 inches of walking space around the bed usually makes the room feel more usable.
Will standard full-size bedding fit all full mattresses?
Most bedding labeled “Full” is made to fit the standard 54" x 75" mattress size, with extra room in the fitted sheet to account for thickness. To improve the fit:
- Check the pocket depth of fitted sheets against your mattress height.
- Verify if your mattress is a regular full or full XL—full XL may need sheets labeled specifically for that size.
✔️ Quick Mattress Takeaways
Key points consumers should understand about What Size Is Full Mattress In Inches:
- Standard full mattress size: 54 inches wide x 75 inches long
- Also known as a “double” mattress in many places
- Wider than a twin by 16 inches, but the same length
- Usually smaller than a queen by 6 inches in width and 5 inches in length
- Suitable for single adults, teens, and guest rooms; cozy but compact for couples
- Thickness (height) varies and does not change the listed full size dimensions
- Full XL and some RV or custom sizes may differ slightly, so checking exact inches is helpful
Understanding What Size Is Full Mattress In Inches gives you a clear starting point for choosing a mattress, planning your room, and buying the right bedding with confidence.
