What Size Is a Double Bed Mattress? Dimensions, Fit, and FAQs

If you’re wondering “What Size Is a Double Bed Mattress”, you’re likely trying to choose the right mattress for a bedroom, guest room, or growing teen. The term “double” can be confusing, especially with similar names like “full” or regional differences in sizing. This guide explains exactly what “double” means, how big it is, and what to consider before buying.

What Size Is a Double Bed Mattress?

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

The typical double mattress dimensions are:

• 54 inches wide x 75 inches long
• Approximately 137 cm wide x 190 cm long

This makes a double mattress wider than a single/twin, but narrower and shorter than a queen.

However, there is an important detail:
In some countries, especially in parts of Europe, the word “double” is used more loosely for any two-person bed, and sizes can vary. That’s why it helps to look at the actual measurements, not just the name.

Why Does the Size of a Double Bed Mattress Matter?

Understanding What Size Is a Double Bed Mattress is important for several reasons:

• Room fit: You’ll want enough space to move around the bed and place other furniture.
• Sleeper comfort: A double can work for one person with extra space, or two people who don’t mind a snug fit.
• Bedding compatibility: Sheets, duvets, and mattress protectors must match the mattress size.
• Future needs: Growing children or teens may eventually want more length or width.

A double mattress is often chosen for guest rooms, smaller primary bedrooms, and teens transitioning from a single bed.

Is a Double the Same as a Full or a Queen?

Double vs Full

In many mattress markets, “double” and “full” refer to the same size:
54" x 75" (137 x 190 cm).

If you see bedding labeled “full,” it will usually fit a standard double bed mattress of these dimensions.

Double vs Queen

A queen mattress is larger than a double. While exact sizing can vary by region, a typical queen is:

• 60 inches wide x 80 inches long
• Approximately 152 cm wide x 203 cm long

So, compared with a double:

• A queen is about 6 inches (15 cm) wider
• And about 5 inches (13 cm) longer

This extra space can make a noticeable difference for couples or taller sleepers.

Common Follow-Up Questions About Double Mattress Sizes

Will a double bed mattress fit two adults?

A double mattress can fit two adults, but space will be limited. Each person gets less width than on a queen or king. Some couples find this cozy; others may feel cramped, especially if:

• One or both sleepers change positions frequently
• There is a big height or build difference
• A pet or child sometimes shares the bed

For solo sleepers, a double often feels comfortably spacious without taking up as much room as a queen.

Is a double mattress long enough for tall people?

At 75 inches (190 cm) long, a standard double may feel short for taller individuals. Sleepers around or above 6 feet (183 cm) might prefer a longer option, such as a queen or a mattress with an “extra-long” variation where available.

What bed frame size do I need for a double mattress?

You’ll typically need a bed frame designed for double/full size. Frame dimensions are slightly larger than the mattress to accommodate:

• Side rails
• Headboard and/or footboard
• Mattress overhang

Always check both mattress measurements and frame specifications to ensure a good fit.

How Does a Double Compare to Other Common Mattress Sizes?

Here’s a simple comparison for context:

Exact dimensions can vary by region, but this table reflects widely used standards.

How Do Regional Differences Affect Double Mattress Sizes?

When asking “What Size Is a Double Bed Mattress”, it’s worth remembering that names can differ by country:

• In some places, “double” is rarely used, and “full” is the common term.
• In others, “double” may refer to a general two-person bed, and sizes like 140 x 190 cm or 140 x 200 cm might be standard.

Because of this, it’s wise to:

• Verify the listed measurements in inches or centimeters
• Compare them to your room size, bed frame, and existing bedding

What Should You Consider Before Choosing a Double Mattress?

When deciding if a double is the right size, think about:

• Number of sleepers: One person vs. two
• Body size and height: Taller or broader sleepers may want more space
• Room dimensions: Measure both floor space and doorway/hallway access
• Future flexibility: Will the bed need to suit different sleepers over time, such as guests or growing children?

If your priority is saving space while still having more width than a single, a double mattress is a practical middle ground.

✔️ Quick Mattress Takeaways

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

• A standard double bed mattress is typically 54" x 75" (137 x 190 cm).
• In many regions, “double” and “full” mean the same size.
• A double is smaller than a queen, both in width and length.
• It can accommodate two adults, but space will be cozy rather than roomy.
• Taller sleepers may find the 75" (190 cm) length a bit short.
• Always check exact measurements, not just the name, since sizes can vary by country.
• Make sure your bed frame, bedding, and room layout match the dimensions of the double mattress you choose.

With a clear understanding of What Size Is a Double Bed Mattress, it becomes much easier to plan your bedroom layout, select suitable bedding, and decide whether this size offers the right balance of comfort and space for your needs.