Mattress Sizes & Bed Dimensions
Choosing the right fit starts with understanding mattress sizes and how they work for your space, sleep style, and lifestyle. From a compact twin bed size for kids or small rooms to a versatile double bed size, all the way up to a spacious queen bed size or larger, each option offers different benefits. This overview of Canadian bed sizes breaks down everything you need to know, so that whether you’re comparing dimensions or ready to upgrade, you can confidently find the best bed size for your needs.
Which bed size is the best for me?

Twin Mattress Size
A twin mattress is the smallest traditional bed on the market at 38 inches wide and 75 inches long. Its compact footprint makes it ideal for single sleepers—either children or adults with small spaces like a studio apartment.
Best for
kids, bunk beds, or single sleepers.
Room size
The minimum room size for a twin bed to fit naturally is 7 x 9 feet. But if you’re looking to outfit the room with cozy accessories like a desk and dresser, an 8 x 10 square foot room may be required for the bed to fit more comfortably.

Twin XL Mattress Size
The twin’s slightly longer cousin, the twin XL mattress, is the most popular size for college dorm rooms. It measures five inches longer than a twin, at 38 inches wide and 80 inches long. In addition to students, XL twin beds are a good solution for taller teenagers and individual adults with limited space. These beds can also be put together if you’re choosing a split king adjustable base for full body adjustability!
Best for
taller teenagers, single adults, or anyone with limited space.
Room size
The minimum room size for a twin XL mattress to fit naturally is 8 x 10 feet. Twin XL beds can also work well in narrow rooms that are at least 7 feet wide.

Double Mattress Size
A double mattress (also known as a full mattress) is suitable for singles or couples looking for compact comfort. That said, those taller than 6 feet should stay away unless they don’t mind their toes hanging off the bed!
Best for
single sleepers, couples who like to snuggle, or for a guest room.
Room size
The minimum room size for a full mattress to fit comfortably is 10 x 10 feet.

Queen Mattress Size
The most popular mattress size on the market is the queen mattress, which is traditionally used in a primary bedroom. At 60 inches wide and 80 inches long, the queen mattress size offers plenty of space for couples or individuals who like having extra room to move around in bed. They’re also an excellent choice if you’re the proud owner of a small or medium-sized furry friend who appreciates the value of a supportive mattress.
Best for
couples or adults who like to sprawl out.
Room size
The queen mattress fits best in a primary bedroom that is at least 10 x 10 feet.

King Mattress Size
At 76 inches wide and 80 inches long, the king mattress is large enough to accommodate couples who share the bed with their children or a sizable pet (think: a Great Dane). A king bed can be made of two twin XL beds pushed together, which is referred to as a split king. King beds are large enough that both sleepers can sprawl out with room to spare.
Best for
couples who enjoy their sleeping space or share a bed with children or large pets.
Room size
A king mattress fits best in a spacious primary bedroom, preferably at least 12 x 12 feet.

California King Mattress Size
A California king mattress is the longest standard size on the market—perfect for tall sleepers who don’t want their feet hanging off the edge. It’s slightly narrower than a standard king size mattress but makes up for it with four extra inches of length. Ideal for couples, especially if one or both are tall, or anyone who prioritizes legroom over width.
Best for
taller couples, sprawling sleepers, or anyone who needs extra legroom.
Room size
A California king mattress fits best in a large primary bedroom, ideally at least 12 x 12 feet.

Split King Mattress Size
A split king mattress combines two twin XL mattresses to form a standard king size—offering both the width of a king and the flexibility of individualized comfort. It’s a popular option for adjustable bases, where each sleeper can customize their side without disturbing the other. Great for couples with different sleep preferences, schedules, or those who prefer personalized sleep setups (e.g. their own sheets & bedding).
Best for
couples who want personalized comfort and compatibility with adjustable bases.
Room size
A split king mattress fits best in a spacious bedroom that’s at least 12 x 12 feet.
Which Mattress Fits Me Best?
Finding the right mattress doesn’t need to feel overwhelming. Start with our mattress quiz to get tailored recommendations based on your sleep style, comfort preferences, and support needs.
Our mattress quiz is designed specifically for Canadian sleepers, helping you quickly filter through the best options available without the guesswork.
Looking for a "what type of mattress is best for me" quiz? This simple guide helps match you with the ideal firmness, materials, and sleep setup so you can finally sleep better.
Take the quiz today and find your perfect sleep match.
Which Bed Size is the Best for Me?
If it’s time for a new mattress, you may be wondering which size is right for you. There are many factors to consider, like who will be sleeping in the bed, the size of your bedroom, and any specific health or sleep issues you might face.
Buying a new mattress is not a one-size-fits-all situation, so it’s essential to evaluate your individual needs. If you have a history of back pain or sleep problems, you may want to take advantage of Casper Canada's 100-night risk-free sleep trial to help you make sure you’re comfortable with your new mattress.
Here are some other major factors you will want to consider when choosing a mattress.
Who Will Sleep in the Bed
Will you be sharing the bed with a partner? Do your children or dogs typically sleep with you? These are questions to ask yourself before deciding on mattress size. Typically twin, twin XL, and full mattresses are meant for one person. On the other hand, queen, king, and California king beds are a good bed size for couples and any children or pets who may wander into the bed in the middle of the night.
If you are going to sleep with another person, consider how close you like to sleep. If you both enjoy stretching out when sleeping, the extra room afforded by a king or California king size will be appreciated, as well as help you avoid any accidental thwacks if your partner rolls over in their sleep.
Your Room Size
The amount of space available to you should also be considered. A larger mattress will take up more space in your bedroom, as will any other bedroom furniture, so you will need to plan accordingly.
To help you decide if there is ample space for the mattress you’re considering for your room, here is a bed size dimensions chart in square inches and square feet:
Twin: 2,925 sq. in./20.3 sq. ft.
Twin XL: 3,120 sq. in./21.7 sq. ft.
Double: 4,050 sq. in./28.1 sq. ft.
Queen: 4,800 sq. in./33.3 sq. ft.
King: 6,080 sq. in./42.2 sq. ft.
California King: 6,048 sq. in./42 sq. ft.
Split King: 6,080 sq. in./42.2 sq. ft.
Your Body Size
You should take your height and width into consideration when choosing a mattress. A typical twin mattress is 75 inches long, while a twin XL is 80 inches long. If an individual is taller than 6 feet 2 inches, a twin mattress is probably not for them. Instead, it’s best to go with the twin XL, full, queen, king, or California king bed, all of which can accommodate someone who is up to 6 feet 7 inches.
Those that are taller than 7 feet should opt for a California king bed. For those who want more space on either side of their body, a full, queen, king, or split king bed will be the most comfortable.
Your Sleep Position
When narrowing down your mattress size choices, consider how much space you’ll need to comfortably move around while you sleep. Do you toss and turn throughout the night, or do you tend not to move once you close your eyes?
You could be a side sleeper, a back sleeper, a stomach sleeper, or a combination of the three (most people are). If you know you do a lot of moving and grooving as you sleep, a wider mattress, like a queen or king, might be a better choice for you.
Your Budget
The amount of money you are willing to spend on a mattress can also help you choose the right size. A king will cost more than a queen size, and a queen more than a full, etc. Buying a mattress that meets both your size needs and your financial needs is key.
Of course, there are other factors that determine the price of a mattress, including:
Materials: The materials that manufacturers use to make their beds play a big role in deciding the final price of a mattress. For example, innerspring and memory foam mattresses like The Casper are a more cost-effective option if you’re on a budget. In contrast, latex and hybrid mattresses use more high-end materials and can cost twice as much but are more durable and provide ample comfort and support.
How you buy it: Nowadays, many people prefer to shop online, but when it comes to mattresses, trying one in person can be helpful. That’s why Casper Canada has retail locations across the country, so you can experience our products firsthand. Prefer to shop from home? Casper.ca offers free shipping straight to your door, plus optional In-Home Delivery and Setup for added convenience.
How to Find the Right Bedding for Your Mattress
Once you’ve found a mattress that checks off all of your must-have boxes, it’s time to treat yourself (and it) to bedding that pairs perfectly with your bedroom’s current aesthetic.
But what exactly does bedding consist of?
Generally speaking, the term bedding includes some of the fundamental accessories for your bed, like:
Bed sheets
A bedspread (usually a comforter, quilt, or duvet)
A duvet cover
A mattress protector
A mattress topper
Pillows
Pillowcases
Pillow protectors
Extra blankets
Find a Mattress Made Just for You With Casper Canada
Finding the perfect mattress isn’t as easy as picking an outfit for an upcoming date night. Like any relationship, it takes time, patience, and an understanding of what you want to find the one.
Whether you ultimately decide on a full size mattress, a king size mattress, or something in between, Casper Canada is here to provide you with a mattress you’ll love just as much in five years as you do the day you bring it home.
From our best-selling Original Hybrid to the cooling (and award-winning) Wave Hybrid Snow, you can choose from a variety of high-quality mattresses available in sizes ranging from twin to California King to fit your room no matter its dimensions.
Browse our full mattress lineup or take our Mattress Quiz to find your perfect match today. Stuck between two mattresses? Check out our helpful Compare Mattresses tool.
