What’s The Size Of a Full Mattress? Standard Dimensions, Fit, and FAQs
If you’re asking “What’s The Size Of a Full Mattress”, you’re usually trying to figure out whether it will fit you and your space. This guide breaks down standard full mattress dimensions, how they compare to other sizes, and when a full bed makes sense.
What’s The Size Of a Full Mattress in Inches and Centimeters?
In most places, a standard full mattress (also called a double mattress) typically measures:
- 54 inches wide x 75 inches long
- Approximately 137 cm wide x 191 cm long
This size is wider than a twin but shorter and narrower than a queen. It’s designed to offer more room than a single bed while still staying compact for smaller bedrooms.
👉 When people ask “What’s The Size Of a Full Mattress”, they are usually referring to this standard 54" x 75" dimension.
How Does a Full Mattress Compare to Other Mattress Sizes?
Understanding where a full bed fits in the size lineup can help you decide if it’s the right choice.
| Mattress Size | Width (in) | Length (in) | Typical Use Case |
|---|---|---|---|
| Twin | 38 | 75 | One child or smaller adult |
| Twin XL | 38 | 80 | Taller single sleeper, college dorms |
| Full | 54 | 75 | One adult, teen, or close couple |
| Queen | 60 | 80 | Most couples |
| King | 76 | 80 | Couples wanting extra personal space |
A full mattress gives a solo sleeper extra width compared to a twin, but less space than a queen. Two adults can share a full, but many find it cozy or tight rather than spacious.
Is a Full Mattress Big Enough for One or Two People?
For one person
Many single sleepers find a full mattress offers:
- More room to spread out than a twin
- Enough space for shifting positions during the night
- A good balance between comfort and footprint in small to mid-sized rooms
A full mattress is often chosen for teen rooms, guest rooms, or studio apartments where space is limited but a bit more comfort is desired.
For two people
Two adults can share a full mattress, but:
- Each person gets less personal space than on a queen or king
- Taller sleepers may notice the 75-inch length feels short, especially if they are over average height
Couples who do not mind being close or who only occasionally share the bed may find a full acceptable, especially in tight spaces.
Will a Full Mattress Fit My Bedroom?
Room size is a key factor when you’re wondering, “What’s The Size Of a Full Mattress and will it work in my space?”
A full mattress (54" x 75") usually fits comfortably in:
- Smaller bedrooms, often around 9' x 10' or larger
- Guest rooms, where floor space for other furniture matters
- Multi-use rooms, like offices or flex spaces with a bed
To check fit, measure:
- Space for the bed frame (often a few inches wider/longer than the mattress)
- Clearance to open doors, drawers, and closets
- Room for side tables or walking space on at least one side
Are There Different Types of Full Mattress Sizes?
Most shoppers only encounter the standard full size (54" x 75"). However, you may also see:
- Full XL (less common): Usually 54" x 80"
- Same width as a full, with 5 extra inches of length
- Helpful for taller sleepers who like the width of a full but need more legroom
Always check exact dimensions in product descriptions, since measurements can vary slightly between manufacturers.
What Bedding Do I Need for a Full Mattress?
When buying bedding, look specifically for the word “Full” (or sometimes “Full/Double”). For a standard full mattress, you will typically need:
- Full fitted sheet: Sized to hug a 54" x 75" mattress
- Full flat (top) sheet: Slightly larger to drape over the sides
- Full or queen comforter/duvet: Some people choose a queen comforter for extra overhang
If your mattress is thicker than average (such as a pillow-top or tall hybrid), look for “deep pocket” or “extra deep pocket” fitted sheets to ensure they stay in place.
Is a Full Mattress a Good Size for Kids or Teens?
A full mattress can be a long-lasting option for:
- Children who are outgrowing a twin
- Teens who want more spreading-out space
- Young adults in first apartments or dorm-style housing
The 54-inch width offers more room to move than a twin, which some growing kids and teens appreciate, especially if they toss and turn.
✔️ Quick Mattress Takeaways
Key points to remember about “What’s The Size Of a Full Mattress”:
- A standard full mattress is 54" wide x 75" long (about 137 cm x 191 cm).
- It’s wider than a twin but smaller than a queen, ideal for one adult, teen, or guest room.
- Two adults can share a full, but space will feel cozy and limited compared to larger sizes.
- Full mattresses work well in smaller bedrooms, often around 9' x 10' or larger.
- Bedding should be labeled “Full” or “Full/Double”, and deep-pocket sheets may help for thicker mattresses.
- Some brands offer Full XL (54" x 80") for extra length, but this size is less common.
With a clear understanding of what’s the size of a full mattress, you can better judge if it fits your body, your room, and how you like to sleep.
