What Size Is a Double Mattress? Exact Dimensions and How It Compares

If you’re wondering “What Size Is a Double Mattress”, you’re likely trying to figure out whether it will fit your room, your bed frame, or your sleep needs. This guide explains standard double mattress dimensions, how they compare to other sizes, and what to consider before choosing one.

What Size Is a Double Mattress in Standard Measurements?

In many regions, a double mattress is the same as a full-size mattress.

The typical dimensions are:

• 54 inches wide x 75 inches long
• Approx. 135 cm wide x 190 cm long

These measurements can vary slightly between manufacturers, but 54" x 75" (135 x 190 cm) is widely recognized as the standard size for a double mattress.

⚠️ Note: In some countries, the term “double” is less commonly used, and “full” is more standard. When asking “What Size Is a Double Mattress,” it often helps to check if the retailer uses the term “full” instead.

How Does a Double Mattress Compare to Other Common Sizes?

Understanding how a double mattress compares to other sizes can help you decide if it’s the right choice.

Compared with a twin, a double mattress is wider, giving one sleeper more room to move. Compared with a queen, it is narrower and slightly shorter, which can matter for couples or taller individuals.

Is a Double Mattress Big Enough for Two People?

A frequent follow-up to “What Size Is a Double Mattress” is whether it’s suitable for two sleepers.

• Width per person: On a double, two people share 54 inches, which is about 27 inches each.
• On a queen, two people share 60 inches, or 30 inches each, which often feels more spacious.

A double mattress can work for two people, especially if:

• Sleepers are comfortable being close together
• They have smaller body frames
• The bed is used in a guest room or for occasional use

For everyday use, many couples find a queen or larger more comfortable, but preferences vary.

Who Is a Double Mattress Best For?

A double mattress is often a practical choice for:

• Single adults who want more space than a twin but don’t need a queen
• Teenagers transitioning from a smaller bed
• Guest rooms where space and versatility matter
• Smaller bedrooms where a queen or king would feel cramped

Because it’s more compact than a queen, a double can be easier to fit into tighter spaces while still offering a larger sleep surface than a twin.

How Much Space Do I Need in My Room for a Double Mattress?

Knowing what size is a double mattress is only part of the picture; you also need to consider room layout.

A standard double mattress (54" x 75") often fits well in:

• Small to medium-sized bedrooms
• Studio apartments
• Multi-purpose rooms (e.g., office/guest room combo)

As a general guideline, many people prefer to leave at least 24–30 inches of walking space around the sides of the bed where possible. This allows easier movement and room for furniture like nightstands.

Do Bedding and Bed Frames Match Double Mattress Sizes?

When shopping for accessories, look for items labeled “double” or “full”, depending on regional terminology.

• Bed frames: Most frames specify compatible sizes (e.g., “full/double frame”).
• Sheets and duvets: Standard full/double sheet sets are designed for 54" x 75" mattresses, though pocket depth can vary.
• Mattress protectors and toppers: Check that they are sized for a double or full mattress, not queen or twin.

If you’re unsure, comparing listed dimensions to 54" x 75" (135 x 190 cm) helps confirm the fit.

✅ Quick Mattress Takeaways

Key points consumers should understand about What Size Is a Double Mattress

• A double mattress typically measures 54" x 75" (135 x 190 cm).
• “Double” and “full” usually refer to the same size.
• It’s wider than a twin but narrower and shorter than a queen.
• Suitable for single adults, teens, and many guest rooms.
• Can fit two people, but space per person is more limited than on a queen.
• Check that bed frames and bedding list compatible dimensions (around 54" x 75").

Understanding What Size Is a Double Mattress helps you plan your room layout, choose compatible bedding, and decide whether the space it provides matches your sleep needs. With its balance of compact footprint and increased width over a twin, a double mattress is a versatile, commonly used option in many homes.