What Are The Measurements Of a Double Size Mattress? Your Essential Guide

If you’re asking “What Are The Measurements Of a Double Size Mattress”, you’re usually trying to figure out whether it will fit your room, your bed frame, or two sleepers comfortably. This guide explains standard double (also called full) mattress dimensions, regional differences, and how to measure correctly so you can plan with confidence.

What Exactly Is a Double Size Mattress?

In many regions, “double” and “full” refer to the same mattress size. It’s wider than a single or twin, but smaller than a queen.

A double size mattress is generally designed for:

• One adult who wants extra width compared to a single or twin
• Two smaller or occasional sleepers who do not need as much personal space

It’s a popular choice for guest rooms, teenagers, and smaller primary bedrooms.

What Are The Measurements Of a Double Size Mattress?

In most places, the standard measurements of a double size mattress are approximately:

These are typical industry standards, but small variations of 1–2 cm or about half an inch can occur between manufacturers.

Do Double Size Mattress Measurements Vary by Country?

Yes, regional naming can cause confusion. Here’s how “double” often compares:

• North America
  • “Double” and “full” are usually the same: 54" x 75" (137 x 191 cm).
• Some European regions
  • A “double” might refer more generally to any mattress for two people. Actual sizes vary widely (for example, 140 x 200 cm is common in some areas).
• UK and similar markets
  • A “double” can be close to 135 x 190 cm, which is very similar to the 137 x 191 cm standard.

Because of this, it’s useful to:

• Check exact measurements in cm or inches, not just the name “double.”
• Confirm bed frame and mattress sizes match, especially if buying from another country.

How Much Space Does a Double Size Mattress Provide?

To understand what the measurements of a double size mattress mean in practice:

• Width: 54 inches (137 cm) total
  • Shared between two sleepers, that’s about 27 inches (68.5 cm) of width each.
• Length: 75 inches (191 cm)
  • May feel short for taller adults, especially those over about 6 feet (183 cm).

Key takeaway:
A double mattress often suits:

• One adult who likes more space than a single or twin
• Two smaller or occasional sleepers who don’t mind sleeping close
• Rooms where a queen might feel too large

How Do I Know If a Double Mattress Will Fit My Room?

To see if a double mattress works in your space, use its standard footprint:

• Mattress area: 54" x 75" (137 x 191 cm)
• Add space for:
  • Bed frame or headboard thickness
  • Walking paths and furniture (nightstands, dressers, desks)

A simple approach:

1. Mark out 54" x 75" (137 x 191 cm) on the floor with tape.
2. Add a few extra inches (or centimeters) around each side to represent the frame.
3. Walk around to check clearance for doors, drawers, and movement.

Will Double Mattress Measurements Fit My Existing Bed Frame?

Most bed frames labeled as “double” or “full” are built for the standard 54" x 75" (137 x 191 cm) mattress. However:

• Some frames have inner measurements slightly larger than the mattress to allow for easy placement.
• If your frame is from a region where mattress standards differ, measure the inside:
  • Measure the internal width and length where the mattress sits.
  • Compare with the standard double size listed above.

A small gap is normal and can be covered by bedding. Too large a gap may affect stability or appearance.

What About Mattress Thickness for a Double Size?

While the footprint of a double size mattress is fairly standard, the height (thickness) can vary widely, often from around 6" (15 cm) to over 14" (36 cm), depending on construction.

When considering thickness:

• Check that the combined height of bed base + mattress is comfortable for getting in and out of bed.
• Make sure fitted sheets are deep enough for the mattress height.

✔️ Quick Mattress Takeaways

Key points to remember about “What Are The Measurements Of a Double Size Mattress”:

• Standard size: About 54" x 75" (137 x 191 cm) in many markets.
• Name confusion: “Double” and “full” are usually the same in North America, but naming and sizing can differ internationally.
• Sleeping space: Offers extra width over a single or twin; two adults will have closer sleeping quarters than on a queen or larger size.
• Room fit: Always measure your room and mark out the mattress footprint before deciding.
• Frame compatibility: Confirm your bed frame’s internal dimensions match standard double measurements.
• Check the label: Look for exact dimensions in inches or centimeters rather than relying only on the word “double.”

Understanding what the measurements of a double size mattress truly are—and how they translate into real-world space—helps you choose a size that fits both your room and your comfort needs.