What Is The Size Of a Full Mattress? Dimensions, Fit, and FAQs

If you’re asking “What Is The Size Of a Full Mattress”, you’re likely trying to figure out whether this classic mattress size will work for your room, your body, or your budget. This guide explains full mattress dimensions, how they compare to other sizes, and when a full bed is a good fit.

What Is The Size Of a Full Mattress in Inches and Centimeters?

In most cases, a standard full mattress (also called a double mattress) measures:

• 54 inches wide x 75 inches long
• Approximately 137 cm wide x 191 cm long

These are the commonly accepted standard full size mattress dimensions in many regions. Thickness can vary a lot between models, so when people ask “What Is The Size Of a Full Mattress”, they are usually talking about width and length, not height.

How Does a Full Mattress Compare to Twin and Queen?

Understanding how a full fits next to other popular sizes can make your decision easier.

A few key differences:

• Compared to a twin, a full mattress is wider by 16 inches, giving more room to spread out.
• Compared to a queen, a full is narrower by 6 inches and shorter by 5 inches, which can matter for couples or taller sleepers.

Is a Full Mattress Good for One or Two People?

A common follow-up to “What Is The Size Of a Full Mattress” is whether it’s big enough for more than one person.

• For one adult:
  A full mattress is often considered comfortable for a single sleeper who wants more width than a twin without taking up as much space as a queen.

• For two adults:
  A full can be tight for most couples, especially if both people like to move around or prefer extra personal space.

• For kids and teens:
  A full mattress is often chosen for growing children, teenagers, or college students, as it offers generous space without overwhelming a smaller room.

What Room Size Works Best for a Full Mattress?

While there’s no single “right” answer, knowing What Is The Size Of a Full Mattress helps you plan your layout.

A full mattress (54" x 75") typically fits well in:

• Small bedrooms or studio apartments
• Guest rooms where space is limited
• Shared kids’ rooms where you still want open floor space

Many people find that a full mattress works best in rooms that allow comfortable space around the bed for walking, a nightstand, and possibly a dresser or desk. Measuring your room before choosing a size is always helpful.

Are There Different Types of Full Mattress Sizes?

Within the “full” category, there are a few related terms you may see:

• Standard Full:
  54" x 75" – the size most people mean when they say “full.”

• Full XL (less common):
  Typically 54" x 80" – similar width, but 5 inches longer than a standard full, providing extra legroom for taller sleepers.

When asking “What Is The Size Of a Full Mattress”, most sources are referring to the standard 54" x 75" size unless they specifically mention “Full XL.”

What Bedding Do You Need for a Full Mattress?

Because full is a standard size, bedding and accessories are widely available, usually labeled as “Full” or “Double.”

For a standard full mattress, you’ll typically look for:

• Full size fitted sheets: Sized for 54" x 75", with pocket depth depending on mattress thickness.
• Full size flat sheets and comforters: Often slightly larger than the mattress to allow draping.
• Full size mattress protectors and toppers: Designed to match the 54" x 75" footprint.

If you have a Full XL, you’ll need to make sure your sheets specifically mention the longer 80-inch length.

Who Is a Full Mattress Best Suited For?

Once you know What Is The Size Of a Full Mattress, the next question is whether it matches your needs and space.

A full mattress often works well for:

• Single adults who want more space than a twin
• Teenagers and college students
• Guest rooms that host one person at a time
• Small bedrooms where a queen would feel crowded

It may feel less ideal for:

• Couples who want extra room
• Very tall sleepers, unless choosing a Full XL
• Rooms designed for larger furniture layouts

✅ Quick Mattress Takeaways

Key points consumers should understand about “What Is The Size Of a Full Mattress”:

• A standard full mattress is 54" wide x 75" long (about 137 cm x 191 cm).
• The term “full” and “double” usually refer to the same size.
• A full is wider than a twin but narrower and shorter than a queen.
• It’s typically best suited for one adult, a teen, or a guest room, rather than most couples.
• Full XL versions add extra length (around 80 inches) for taller sleepers.
• Full size bedding and accessories are easy to find because it’s a standard mattress size.
• Measuring your room and existing furniture before choosing a full mattress helps ensure a comfortable fit.

Understanding What Is The Size Of a Full Mattress gives you a solid starting point for deciding if this classic, space-saving size fits your sleep style and your bedroom layout.