Double Mattress Size in CM, Inches and Feet

Double Mattress Dimensions: CM, Inches, and Feet

Here are the standard double mattress dimensions in every common unit of measurement:

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These measurements are standard across Canadian and American mattress manufacturers. Whether you buy a double mattress from a big-box store or from a local shop like ours, the dimensions will be 137 x 191 cm (54 x 75 inches).

Keep in mind that the mattress thickness (also called profile or height) varies by model. A typical double mattress is anywhere from 8 to 14 inches tall, but the width and length stay the same regardless of the profile. Our 10" Premium BioFoam Mattress, for example, is available in a standard double size with a comfortable 10-inch profile that works with most bed frames.

Double vs Full Mattress: What Is the Difference?

This is one of the most common questions we hear at the store, and the answer is simple: a double mattress and a full mattress are the exact same thing.

There is no difference in size, construction, or quality between a "double" and a "full." They both measure 137 x 191 cm (54 x 75 inches). The only difference is the name, and that comes down to geography and habit.

Why Two Names for the Same Mattress?

The term "double" has been in use since the early days of mattress manufacturing. It was called a "double" because it was roughly twice the width of a twin mattress (which is 38 inches wide, compared to the double's 54 inches). In Canada, the UK, and Australia, "double" remains the most common term.

In the United States, the industry gradually shifted to calling this size a "full" to distinguish it from the queen size, which was introduced in the 1960s. American retailers and manufacturers use "full" almost exclusively.

When shopping online, you may see listings for "full/double" to cover both naming conventions. If you are buying from a Canadian retailer, expect to see "double." If the brand is American, expect "full." Either way, you are getting the same full size mattress dimensions: 137 x 191 cm.

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Double vs Queen Mattress: Size Comparison

If you are trying to decide between a double and a queen, the size difference is worth understanding. A queen mattress measures 152 x 203 cm (60 x 80 inches), making it noticeably larger than a double in both width and length.

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Those extra 6 inches of width and 5 inches of length add up to about 18% more sleeping surface on a queen. For a single sleeper, that extra space is a luxury. For two people sharing the bed, it can make the difference between a restful night and a cramped one.

When to Choose a Double Over a Queen

• Your room is smaller than 10 x 12 feet. A queen needs more floor space to fit comfortably with nightstands and walking room.
• You sleep alone. A double gives a single adult plenty of room to stretch out.
• Budget matters. Double mattresses, sheets, bed frames, and box springs all cost less than their queen-sized counterparts.
• It is for a guest room or teen bedroom. A double is more than adequate for occasional use or a growing teenager.

When to Choose a Queen Instead

• Two adults share the bed every night. Each person gets only 27 inches of width on a double, compared to 30 inches on a queen.
• You are taller than 6 feet. The double's 75-inch length may feel short. The queen gives you 80 inches.
• You have a pet that sleeps on the bed. That extra space disappears fast with a dog or cat on board.

For a broader look at all standard mattress sizes, check out our Complete Bed Size Chart.

Who Should Sleep on a Double Mattress?

A double bed size of 137 x 191 cm works well for several types of sleepers. Here is a breakdown of who will be comfortable on a double and who might want to size up.

Single Adults

If you sleep alone, a double mattress gives you 54 inches of width to work with. That is 16 inches more than a twin and plenty of room for most adults to sleep comfortably in any position. Side sleepers, back sleepers, and stomach sleepers all have enough space to find their preferred position without hanging off the edge.

Couples Who Do Not Mind Close Contact

A double can work for two people, but it is a snug fit. Each partner gets about 27 inches of personal space, which is less than what a child gets on a twin mattress (38 inches). If you and your partner are on the smaller side, sleep close together naturally, or do not move around much at night, a double might be just fine. If either of you is a restless sleeper or runs hot, consider stepping up to a queen.

Teenagers and Young Adults

A double is an excellent choice for a teen's bedroom. It is a meaningful upgrade from a twin, giving them room to spread out, study on the bed, or have a friend over for a sleepover. It also fits well in the typical 10 x 10 or 10 x 12 foot bedroom that most teens occupy.

Guest Rooms

For a spare bedroom, a double mattress hits the sweet spot between comfort and space efficiency. It is large enough to accommodate most guests (single or couple) without dominating the room. Pair it with a Canadian-Made Platform Bed for a clean, space-saving guest room setup that does not require a box spring.

Studio Apartments and Smaller Spaces

If you live in a studio apartment or a condo with a compact bedroom, a double lets you sleep comfortably without sacrificing your entire floor plan. You will still have room for a desk, dresser, or seating area.

What Room Size Do You Need for a Double Bed?

The minimum recommended room size for a double mattress is 10 x 10 feet (3 x 3 metres). This gives you enough clearance to:

• Walk around both sides of the bed
• Open dresser drawers and closet doors without bumping into the bed frame
• Place a nightstand on at least one side
• Make the bed without pressing against the wall

If your room is 10 x 12 feet or larger, you will have even more flexibility. You can fit a nightstand on each side, add a bench at the foot of the bed, or include a small reading chair.

Room Layout Tips for a Double Bed

Centre the bed on the longest wall. This creates a balanced look and maximizes walking space on both sides. Leave at least 24 inches (60 cm) of clearance between the bed and the nearest wall or piece of furniture.

Push the bed into a corner if space is tight. In a very small room (under 10 x 10 feet), you can place the double bed with one side against the wall. This frees up floor space, though it makes it harder for two people to get in and out.

Measure before you buy. Grab a tape measure and mark out 137 x 191 cm on your floor using painter's tape. This gives you a visual preview of how the mattress will fit. Do not forget to account for the bed frame, which adds 2 to 5 inches on each side depending on the style.

How Much Does a Double Mattress Cost in Canada?

Double mattresses in Canada typically range from $399 to $1,500, depending on the materials, construction quality, and brand. Here is a general breakdown of what you can expect at each price level:

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At Mattress Miracle, we carry double mattresses across this full range. Our Gel Comfort Cooling Memory Foam Mattress is a popular mid-range choice that features gel-infused foam for temperature regulation. If you are looking for something more affordable, our 10" Premium BioFoam Mattress delivers excellent comfort at a value price.

One of the biggest advantages of buying a double is cost savings across the board. Compared to a queen, you will pay less for the mattress, less for sheets and bedding, less for the bed frame, and less for a double box spring if your setup requires one.

Tips for Choosing the Right Double Mattress

Once you have decided that a double is the right size, the next step is choosing the right mattress within that size. Here are the key factors to consider.

1. Firmness Level

Firmness is personal. Side sleepers generally prefer a medium to medium-soft mattress that cushions the shoulders and hips. Back sleepers do well with medium to medium-firm support. Stomach sleepers need a firmer surface to keep the spine aligned. If you share the bed, a medium-firm option is usually the safest compromise.

2. Material Type

Memory foam contours closely to the body and isolates motion well, making it a good choice for couples on a double. Innerspring and pocketed coil mattresses offer a more traditional bounce and better airflow. Hybrid mattresses combine coils with foam layers for a balance of support and pressure relief. Latex is responsive and naturally cooling, though it tends to cost more.

3. Cooling Features

If you tend to sleep hot, look for a double mattress with gel-infused foam, open-cell foam construction, or a breathable cover. Sleeping on a smaller surface with a partner generates more shared body heat, so cooling features become especially important on a double.

4. Edge Support

Because a double is narrower than a queen, good edge support matters more. Reinforced edges keep you from feeling like you are rolling off the bed and effectively give you more usable sleeping surface. This is particularly important if two people share the mattress.

5. Mattress Height and Your Bed Frame

Make sure the mattress profile works with your bed frame and box spring (if you use one). A very thick mattress on a tall platform bed can make the sleeping surface uncomfortably high. A thin mattress on a low frame might make it hard to get in and out. Aim for a total bed height (frame plus mattress) of about 25 inches from the floor, which works well for most adults.

6. Try Before You Buy

There is no substitute for lying on a mattress in person. Spend at least 10 to 15 minutes on each mattress you are considering, in your usual sleeping position. At Mattress Miracle, we encourage every customer to take their time testing mattresses. Brad and Dorothy are always available to walk you through the options and help you find the right fit for your body and budget.