What Size Is Full Bed Mattress? Dimensions, Fit, and FAQs
If you’re asking “What size is full bed mattress?”, you’re likely trying to decide whether a full (also called a double) mattress will fit your room, your body, or both. This guide explains the exact dimensions of a full mattress, how it compares to other sizes, and when it’s the right choice.
What Size Is Full Bed Mattress in Inches and Centimeters?
A standard full size mattress typically measures:
- 54 inches wide x 75 inches long
- Approx. 137 cm wide x 191 cm long
This is the most common answer to “What size is full bed mattress?” in North America. A full mattress is wider than a twin but shorter than a queen.
⚠️ Note: Dimensions can vary slightly by manufacturer, but the standard listed above is widely recognized.
How Does a Full Mattress Compare to Other Mattress Sizes?
It often helps to see full size in context with other common mattress sizes.
| Mattress Size | Width x Length (inches) | Typical Use |
|---|---|---|
| Twin | 38" x 75" | Children, smaller spaces |
| Twin XL | 38" x 80" | Taller teens, college dorms |
| Full | 54" x 75" | Solo adults, teens, guest rooms |
| Queen | 60" x 80" | Couples, primary bedrooms |
| King | 76" x 80" | Couples wanting extra space |
Key difference:
A full mattress is 16 inches wider than a twin, giving more room to spread out, but it is the same length as a twin.
Is a Full Mattress Big Enough for Two People?
Technically, two people can share a full mattress, but it may feel snug.
- A full gives each person about 27 inches of width, which is less than the width of a standard crib mattress per person.
- Many couples find a queen or king more comfortable for long-term sharing.
- A full mattress is often preferred for:
- Solo adults who want more space than a twin
- Teens who have outgrown kid beds
- Guest rooms where space or budget is limited
If you’re wondering “What size is full bed mattress good for?”, the common answer is: one adult or teen who wants a balance between space and room efficiency.
How Much Space Do You Need for a Full Bed?
Beyond asking “What size is full bed mattress?”, it’s important to consider the overall footprint of a full bed, including the frame.
- The mattress itself: 54" x 75"
- With a typical frame or headboard: expect an additional 2–5 inches in width and length.
- For comfortable movement around the bed, many people aim to leave at least 24–30 inches of open space on the sides and at the foot.
A full size bed often works well in:
- Smaller primary bedrooms
- Apartments and studios
- Guest rooms that need to serve multiple purposes
Are There Different Versions of a Full Mattress (Like Full XL)?
When you search “What size is full bed mattress”, you might see references to Full XL.
- Full XL: typically 54" x 80"
- Same width as a full, but 5 inches longer
- Useful for taller sleepers who need extra legroom
Full XL is less common than the standard full, so options for frames, bedding, and accessories may be more limited.
What Bedding and Accessories Fit a Full Mattress?
When buying bedding or accessories, look specifically for “Full” size on the label.
Common items sized for a full mattress include:
- Fitted sheets: designed for 54" x 75" mattresses
- Flat sheets and comforters: often slightly larger to drape over the sides
- Mattress protectors and toppers: labeled “Full” or “Double”
Some bedding is labeled “Full/Queen”, which is designed to fit both sizes with extra fabric. This usually works, though it may hang lower on a full than on a queen.
Who Is a Full Mattress Best For?
When considering what size is full bed mattress suitable for, think about:
Sleepers
- Solo adult who wants more space than a twin
- Teen or college-aged sleeper
- Occasional use by two people for short stays
Rooms
- Rooms that feel tight with a queen
- Multi-purpose rooms (office + guest room)
- Smaller apartments where every inch matters
In many homes, a full strikes a balance between comfort and space-saving.
✔️ Quick Mattress Takeaways
Key points consumers should understand about “What Size Is Full Bed Mattress”
- Standard full mattress size: 54" wide x 75" long (about 137 cm x 191 cm).
- A full is wider than a twin but shorter and narrower than a queen.
- It is generally best suited for one adult or teen, or short-term use by two people.
- A Full XL option (54" x 80") exists but is less common.
- Leave extra room around the bed: consider space for the frame and walking clearance.
- Look for “Full” labeled bedding for the best fit on sheets, toppers, and protectors.
Understanding what size is full bed mattress—and how it fits your room and lifestyle—helps you choose a mattress that feels comfortable, practical, and well-matched to your space.
