What Are The Dimensions Of a Single Size Mattress? A Simple Guide to This Compact Bed Size

If you’re asking “What Are The Dimensions Of a Single Size Mattress”, you’re likely trying to figure out whether this compact mattress size will fit your room, your bed frame, or the person sleeping on it. This guide answers that question clearly and walks through the most common follow-up questions.

What Are The Dimensions Of a Single Size Mattress?

In many regions, a standard single size mattress typically measures:

This is often considered the classic “single bed” size, especially in places where metric sizing is common.

However, it’s important to know that mattress terminology can vary by country. In some areas, a single size may align closely with what others call a twin mattress, which is usually around:

Because of these regional differences, the answer to “What Are The Dimensions Of a Single Size Mattress” can slightly change depending on where you live, but the general idea is the same: it’s a narrow bed designed for one sleeper.

Why Do Single Mattress Dimensions Matter?

Knowing the exact dimensions helps you:

Check room fit: Will it leave enough space to move around, add a desk, or open wardrobe doors?
Match your bed frame: A mismatch can lead to gaps, overhang, or an unstable sleeping surface.
Choose bedding that fits: Sheets, mattress protectors, and duvets are sized to specific mattress measurements.
Plan for comfort: Taller sleepers or those who move a lot at night may need a longer or wider option.

A single size mattress is often chosen for children’s rooms, guest rooms, and small bedrooms where floor space is limited.

Single vs Twin: Are They the Same Size?

Is a Single Mattress the Same as a Twin?

In many modern markets, “single” and “twin” are often used interchangeably, both referring to a mattress close to 38" x 75" (96.5 cm x 190.5 cm).

In other regions, “single” is the standard 90 x 190 cm, and “twin” is not commonly used at all.

Because of this, when you search for “What Are The Dimensions Of a Single Size Mattress”, you may see slightly different figures depending on whether the source is using UK, European, or North American naming.

How Does a Small Single Compare?

Some areas also offer a “small single” mattress, which is even narrower, for very tight spaces or some adjustable beds. A common small single dimension is roughly:

75–80 cm x 190 cm (about 2'6" x 6'3")

If you’re furnishing a compact room, it helps to check if the product is labeled small single, single, or twin, and then confirm the actual measurements.

Who Is a Single Size Mattress Best For?

A single size mattress can work well for:

Children and teenagers
Single adults in compact rooms
Guest bedrooms used occasionally
Bunk beds or daybeds designed for one sleeper

Many people find that a single mattress provides enough space for one person to lie comfortably, especially if they are not very tall or do not spread out much while sleeping.

How Much Space Does a Single Mattress Take in a Room?

To plan your layout, consider the mattress plus some clearance around it. Using a standard single around 90 x 190 cm, you might want:

At least 60–75 cm (2–2.5 feet) of walking space on at least one side
Extra length at the foot of the bed if doors or drawers open nearby
Space for other furniture such as a desk or wardrobe

A quick way to visualize:
If your room is small, a single size mattress often leaves more usable floor area than any wider option, making it a practical choice.

What Should You Check Before Buying a Single Mattress?

Here are key points to confirm:

Exact dimensions: Look for the full measurements, not just the name “single.”
Room layout: Measure the room and sketch where the bed will go.
Bed frame and base: Ensure they are designed to fit the same size.
Bedding size: Check that sheets and covers list the same dimensions.
Sleeper’s height and habits: Taller or very active sleepers may need extra length or width.

✅ Quick Mattress Takeaways

Key points to understand about “What Are The Dimensions Of a Single Size Mattress”:

Typical single size: Around 90 cm x 190 cm (3'0" x 6'3"), depending on region.
Twin overlap: In some places, a “single” is similar to a twin (about 38" x 75" / 96.5 x 190.5 cm).
Regional variation: Names like single, twin, small single can differ between countries—always check the actual measurements.
Best use cases: Ideal for children, teens, guest rooms, and small bedrooms where saving space matters.
Space planning: Allow at least 2–2.5 feet of clearance on one side if possible for comfortable movement.
Bedding fit: Sheets and protectors must match the mattress dimensions to stay secure and comfortable.

Understanding What Are The Dimensions Of a Single Size Mattress helps you avoid sizing surprises, match your frame and bedding correctly, and make the most of your bedroom space. By double-checking the exact measurements and considering who will be sleeping on it, you can choose a single size mattress that fits both your room and your everyday needs.