Full Size Mattress for Sale: What to Know Before You Buy

If you are shopping for a full size mattress for sale in Ontario, you are in the right place. The full size , also called a double , has been a Canadian bedroom staple for decades, and it remains one of the most in-demand mattress sizes because it hits a useful middle ground: larger than a twin, more affordable than a queen, and a natural fit for a wide range of sleepers and room sizes. Whether you are furnishing a guest room, setting up a teenager's first real bed, or simply replacing an aging mattress in a smaller space, understanding what the full size offers , and where it falls short , will help you make a confident purchase.

At Mattress Miracle in Brantford, we have carried full size mattresses across every type and price point for decades. Our team does not work on commission, so when you walk in, you get straightforward advice based on your actual needs. This guide covers everything you should know before you buy: exact dimensions, who benefits most from this size, available types and materials, current Canadian price ranges, and the key factors to evaluate when comparing models in store or online.

Full Size Mattress Dimensions

A full size mattress measures 54 inches wide by 75 inches long , or 137 centimetres by 191 centimetres in metric. That width gives a solo sleeper roughly 27 inches of personal space, which is comparable to what you would have on a twin, since a twin is 38 inches wide and a full is 54. The extra width on a full primarily benefits couples sharing the bed, though the 75-inch length can feel short for taller adults.

Mattress Size	Width (in)	Length (in)	Width (cm)	Length (cm)
Twin	38	75	97	191
Full (Double)	54	75	137	191
Queen	60	80	152	203
King	76	80	193	203

One important detail: the full and the twin share the same 75-inch length, while the queen and king are five inches longer at 80 inches. This matters for taller sleepers. If you or your partner is six feet or taller, the full size may leave your feet hanging off the edge. For anyone under six feet sleeping alone, the 75-inch length is generally comfortable.

Room size is the other critical dimension to plan around. A full size mattress fits best in a bedroom that is at least 10 by 10 feet, and you will have comfortable clearance around the bed in a 10 by 12 foot or larger room. If your room is closer to 9 by 9 feet, you may find the footprint cramped once you add nightstands or a dresser. Measure your room before you commit to any size.

Who Is a Full Size Mattress Best For?

The full size mattress suits a specific set of sleepers very well, and it is worth being clear about who benefits and who might want to step up to a queen.

Solo sleepers who want more space than a twin. If you have been sleeping on a 38-inch twin and want room to stretch out without jumping to queen pricing, the full is a natural upgrade. The additional 16 inches of width makes a real difference for restless sleepers or anyone who tends to sleep diagonally.

Teenagers and young adults. A full is one of the most common mattresses for teenage bedrooms. It fits standard bedroom furniture, accommodates growing bodies better than a twin, and does not overwhelm a typical 10 by 10 room. It also holds up well for years of heavy use, making it a practical investment for parents furnishing a first proper adult bed.

Guest rooms. Many guest rooms are set up with a full size because it can comfortably host a single adult or an occasional couple without requiring the footprint or budget of a queen. If your guest room is on the smaller side, a full is often the most practical solution.

Couples on a budget in a smaller space. For couples who cannot justify a queen due to room size constraints or budget, a full can work , but both partners should ideally test the mattress in store first. Two adults sharing 54 inches is workable but snug, and it tends to suit lighter sleepers or couples who do not mind being close.

People furnishing a smaller apartment or condo. In urban living situations where bedrooms are compact, the full size is often the most practical choice. It leaves enough floor space for essential furniture without the room feeling like a hallway.

Who should consider a queen instead? Adults over six feet tall, couples who both move during the night, and anyone whose room can accommodate the additional six inches of width will typically sleep better on a queen. The price difference between a full and queen has also narrowed considerably in recent years, which makes the upgrade easier to justify for many buyers.

Full Size Mattress Types Available

The full size is manufactured in every major mattress construction, so you have the same range of options you would find in a queen or king. Here is how each type performs in this size.

Foam (Memory Foam and Polyfoam)

All-foam mattresses in the full size are typically the lightest option, making them easy to move and set up in tighter spaces. Memory foam conforms closely to the body, reduces motion transfer, and works well for side sleepers who need pressure relief at the shoulders and hips. The tradeoff is heat retention , traditional memory foam can sleep warm, though many modern models use open-cell foam or gel infusions to address this. Polyfoam mattresses tend to be more responsive and less expensive, but they do not contour as closely as memory foam.

Innerspring

Innerspring mattresses use a coil support system with a comfort layer on top. They tend to sleep cooler than foam because the open coil structure promotes airflow. They are also more responsive , meaning they react quickly when you move , which some sleepers prefer. The main limitation of budget innerspring models is motion isolation: if one person gets up during the night, the other may feel it. Higher-end innerspring models with individually wrapped (pocketed) coils handle motion transfer much better.

Hybrid

Hybrid mattresses combine a pocketed coil support core with foam or latex comfort layers. In a full size, this construction gives you the airflow and responsiveness of coils with the pressure relief and contouring of foam. Hybrids are often the best all-around option for couples sharing a full, because the pocketed coils provide better motion isolation than traditional innerspring while still promoting airflow. They typically cost more than all-foam or basic innerspring models, but the sleep experience justifies the price difference for many buyers.

Latex

Latex mattresses are made from either natural rubber latex or synthetic latex. Natural latex is durable, breathable, and responsive , it contours to the body without the slow-sinking feel of memory foam. Latex mattresses are among the longest-lasting options on the market, often performing well for 10 to 15 years with proper care. They also tend to be heavier than foam models, which is worth considering when moving or rotating. Natural latex options are a good fit for buyers who want an eco-conscious mattress material with strong durability.

Pillow Top and Euro Top

These are not separate mattress types but rather comfort layer constructions added to innerspring or hybrid cores. A pillow top adds a sewn-on cushioning layer on top of the mattress, while a euro top is flush with the sides for a more tailored look. Both add softness and initial comfort. The trade-off is that pillow tops can compress over time, particularly if the mattress is not rotated regularly.

Full Size Mattress Price Ranges in Canada

Pricing for full size mattresses in Canada varies widely depending on construction, brand, and where you buy. Here is a practical breakdown of what you can expect to pay.

Price Range (CAD)	What You Get	Best For
Under $400	Basic polyfoam or budget innerspring; thin comfort layers; shorter lifespan	Temporary use, guest rooms, tight budgets
$400 to $800	Mid-range memory foam or pocketed coil innerspring; decent durability	Solo sleepers, teenagers, everyday use
$800 to $1,400	Quality hybrid or all-latex; better pressure relief, temperature regulation, and longevity	Primary bed for adults, couples sharing a full
$1,400 and up	Premium hybrid or natural latex; high coil counts; advanced cooling; long warranties	Buyers who want a long-term investment and premium feel

Online mattress brands often appear to offer lower prices, but keep in mind that their pricing typically includes shipping to your door without any in-store testing opportunity. The mattress you receive may not match the feel you expected based on online descriptions. In-store purchases allow you to test firmness levels, compare materials side by side, and get advice from staff who can match your sleep position and weight to the right model. For something you will spend a third of your life on, that hands-on evaluation is worth the trip.

Sales events in Canada , including long weekends and seasonal clearance periods , often bring full size mattresses down by 20 to 40 percent from regular prices. At Mattress Miracle, we regularly carry floor models and clearance mattresses that represent significant savings without sacrificing quality.

What to Look for When Shopping for a Full Size Mattress

Walking into a mattress store (or scrolling through an online catalogue) can feel overwhelming without a framework. These are the factors that matter most when evaluating a full size mattress.

Firmness Level

Firmness is the most important fit variable, and it is highly personal. The industry uses a general scale from 1 (very soft) to 10 (very firm). Most sleepers fall in the 4-to-7 range. Side sleepers typically need a softer to medium surface (3 to 5) to cushion the shoulders and hips. Back sleepers tend to do best on a medium to medium-firm surface (5 to 7) that supports spinal alignment. Stomach sleepers generally need a firmer surface (6 to 8) to prevent the hips from sinking and straining the lower back. Your body weight also matters: heavier sleepers tend to sink deeper into the same foam, so they often need a firmer model than lighter sleepers to achieve the same feel.

Support Core Quality

The support core determines how long a mattress holds its shape. For innerspring and hybrid mattresses, look for individually pocketed coils rather than interconnected Bonnell or offset coils. Pocketed coils move independently, which improves motion isolation and contouring. For foam mattresses, look for a high-density base foam layer (at least 1.8 pounds per cubic foot for polyfoam) , this is the foundation that resists sagging over time.

Comfort Layer Materials and Thickness

The comfort layers are what you feel directly. Memory foam comfort layers should be at least 2 to 3 inches thick to provide meaningful pressure relief. Thin comfort layers on budget mattresses often compress within a year or two. If you are buying a hybrid, the total foam comfort layer depth matters as much as the coil count.

Trial Period and Return Policy

Reputable mattress retailers offer trial periods because it takes a few weeks of actual sleep to fully evaluate a mattress. Look for at least a 90-day trial if you are buying online. For in-store purchases, ask about the exchange or comfort guarantee policy before you commit.

Warranty

Most quality mattresses come with a 10-year warranty as an industry standard. Read the fine print: some warranties cover only manufacturing defects, while others cover sagging above a certain threshold (usually 1 to 1.5 inches). Prorated warranties offer diminishing coverage over time; non-prorated warranties maintain full coverage for the warranty period.

Weight and Ease of Setup

If you are setting the mattress up in a bedroom with tight stairwell access or a small doorway, check the weight. All-foam mattresses are typically the lightest and easiest to maneuver. Heavy hybrid or latex mattresses may require two people. Some foam mattresses ship compressed in a roll-up box, which simplifies delivery but requires allowing a full 48 hours for the mattress to expand before sleeping on it.

Full Size vs. Queen , Making the Right Choice

The question we hear most often in store is whether to get a full or step up to a queen. Here is a direct comparison to help you decide.

Factor	Full (Double)	Queen
Width	54 inches	60 inches
Length	75 inches	80 inches
Best for	Solo sleepers, teens, guest rooms, smaller rooms	Couples, taller adults, larger bedrooms
Minimum room size	10 x 10 ft	10 x 12 ft
Price difference (approx.)	Base price	$100 to $300 more depending on model
Bed frame/sheet availability	Good	Excellent (most common size in Canada)

The six-inch width difference between a full and queen is more significant than it sounds. For a couple, those extra inches translate to roughly three additional inches per person. Over the course of a night of sleep, that space matters. If your room can accommodate a queen and your budget allows for it, the queen is usually the better long-term investment for couples. For solo sleepers and guest rooms, the full is often the smarter choice because the savings are real and the sleep experience is excellent.

The five-inch length difference is equally important for taller sleepers. Adults who are six feet or taller will often feel crowded on the 75-inch length of a full and will be much more comfortable on the 80-inch queen.

Shopping for Full Size Mattresses in Ontario

Ontario buyers have several options when shopping for a full size mattress, ranging from big-box retailers to specialty sleep stores to online brands. Each channel has tradeoffs.

Big-box retailers (furniture chain stores and department stores) carry a broad selection at varying price points, but sales staff are often generalists rather than sleep specialists. You may have less opportunity for a detailed firmness assessment, and floor models can be limited.

Online mattress brands have expanded significantly in Canada over the past decade. They offer convenient delivery and generous trial periods, but the inability to test before you buy is a genuine limitation. Return processes can also be cumbersome, particularly for heavier mattresses. Some shoppers find that the mattress they receive does not match the firmness they expected based on descriptions alone.

Independent sleep specialty stores like Mattress Miracle offer a different experience. Because the entire store is focused on sleep, the staff have deeper product knowledge, and the floor selection is curated for quality rather than volume. You can lie on multiple models side by side and compare them directly, which is the most reliable way to find the right firmness for your body.

When evaluating any Ontario mattress retailer, check for these specifics: whether they offer delivery and setup, whether they remove your old mattress, what their exchange policy looks like, and whether they can work within your budget without pressure to upsell. At Mattress Miracle, delivery and mattress removal are straightforward, and our no-commission sales floor means you will not be steered toward a higher price point than you need.

If you are located outside Brantford, we serve customers from across the region, including Hamilton, Cambridge, Kitchener-Waterloo, Simcoe, and surrounding communities in southwestern Ontario. Many customers find it worth the drive because our pricing, selection, and in-store experience compare favourably to anything available closer to home.

Frequently Asked Questions About Full Size Mattresses

What is the difference between a full size and a double mattress?

There is no difference. Full size and double are two names for the same mattress dimensions: 54 inches wide by 75 inches long (137 cm x 191 cm). The term "double" was more common historically in Canada; "full" is the more widely used term today.

Is a full size mattress big enough for two adults?

A full size can accommodate two adults, but it is snug , each person gets roughly 27 inches of width, the same as a twin. Couples who move during the night or prefer more personal space will typically be more comfortable on a queen. A full works best for couples in a smaller room or on a tighter budget who are comfortable sleeping close together.

How long does a full size mattress typically last?

A quality full size mattress should last 7 to 10 years with proper care. Rotating the mattress every 3 to 6 months helps extend its lifespan by distributing wear evenly. Using a mattress protector from day one prevents moisture and debris from breaking down foam layers prematurely. Budget foam mattresses may show sagging within 3 to 5 years; higher-end hybrid and latex models often perform well beyond the 10-year mark.

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

A full size mattress requires a full or double bed frame. Standard full frames are widely available in Canada from most furniture retailers. If you are using a platform bed, ensure the slats are no more than 3 inches apart to provide adequate support for foam mattresses. Box springs are compatible with traditional innerspring mattresses and some hybrids, but many modern foam and latex mattresses perform best on a solid or closely slatted platform.

How much should I expect to pay for a good full size mattress in Canada?

A quality full size mattress in Canada typically costs between $600 and $1,200, depending on construction and brand. Budget models start under $400, but these often use thinner comfort layers that compress faster. Mid-range hybrid and memory foam options in the $700 to $1,000 range offer the best balance of comfort, durability, and price for most buyers. Premium natural latex or high-coil-count hybrid models run $1,200 and above.

Can I use full size sheets on a double mattress?

Yes. Full size and double are the same dimensions, so full size sheets fit a double mattress perfectly. When shopping for sheets, look for a pocket depth that matches your mattress height, particularly if your mattress has a pillow top or is thicker than 12 inches. Deep-pocket full size sheets (with a 15- to 18-inch pocket) accommodate thicker mattresses without pulling off the corners.

Is it worth buying a full size mattress or should I just get a queen?

It depends on your room size, budget, and sleeping situation. For solo sleepers, teenagers, and guest rooms, a full size mattress is an excellent value that provides comfortable sleep at a lower price point. For couples sharing the bed or taller adults over six feet, a queen is usually the better investment because of its additional width and length. The price gap between full and queen has narrowed, so if your room can fit a queen and your budget allows, upgrading is worth considering.

Sources

• Sleep Foundation. "Mattress Sizes and Dimensions Guide." sleepfoundation.org. Accessed March 2026.
• Canadian Sleep Society. "Healthy Sleep Guidelines." css-scs.ca. Accessed March 2026.
• Better Sleep Council Canada. "Choosing the Right Mattress Size." bettersleep.org. Accessed March 2026.
• Consumer Reports. "How to Buy a Mattress." consumerreports.org. Accessed March 2026.
• National Sleep Foundation. "What Is the Best Mattress?" thensf.org. Accessed March 2026.

8 min read

Visit Our Brantford Showroom

We are located at 441½ West Street in downtown Brantford. Free parking available. Our team does not work on commission, so you get honest advice based on your needs.

Mattress Miracle , 441½ West Street, Brantford, ON , (519) 770-0001

Hours: Monday–Wednesday 10am–6pm, Thursday–Friday 10am–7pm, Saturday 10am–5pm, Sunday 12pm–4pm.

We carry full size mattresses across all types and price points , come in and find the right one for your room and budget.