Standard fixed window sizes in Canada typically range from 24 × 36 inches to 72 × 60 inches, with most window manufacturers offering widths between 24 and 96 inches and heights from 24 to 72 inches. These dimensions fit the rough opening sizes found in the majority of Canadian homes built in the last 50 years. Fixed picture windows are non-operable, meaning they stay closed at all times, which makes them one of the most energy efficient window types on the market. If you are shopping for new windows or planning a window installation project, knowing the standard sizes will save you time, money, and headaches.
Why fixed windows are so popular
Fixed windows — also called picture windows — have no moving parts. There are no sashes, cranks, or tracks to wear out. This simple design means a tighter seal, fewer drafts, and better insulation. Because the window frame does not need space for hardware, more of the opening is filled with glass. That gives you a larger glass surface area and more natural light in every room.
Homeowners across Toronto and the GTA choose fixed replacement windows for living rooms, hallways, stairwells, and anywhere a view matters more than ventilation. When paired with casement window types or awning windows on either side, a fixed unit becomes the centrepiece of a window wall that brings in daylight and fresh air at the same time.
Common standard fixed window sizes
The table below covers the most popular picture window sizes you will find from Canadian window manufacturers. Sizes are listed as width × height, and all measurements are in inches.
| Width (in.) | Height (in.) | Typical use |
| 24 × 36 | 24 wide × 36 tall | Bathrooms, basements, accent walls |
| 36 × 36 | 36 wide × 36 tall | Kitchens, above sinks |
| 36 × 48 | 36 wide × 48 tall | Bedrooms, side panels |
| 48 × 48 | 48 wide × 48 tall | Living rooms, dining areas |
| 60 × 48 | 60 wide × 48 tall | Open-concept rooms |
| 72 × 48 | 72 wide × 48 tall | Large picture window feature walls |
| 72 × 60 | 72 wide × 60 tall | Panoramic views, great rooms |
Smaller windows like 24 × 36 work well in tight spaces or as part of a multi-unit arrangement. Larger windows — 60 inches wide and above — turn a plain wall into a bright focal point. If you need something outside this range, most manufacturers offer custom window sizes to match your exact rough opening.
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How window frame profile affects glass area
Two fixed picture windows can share the same outer dimensions yet look very different. The reason is the window profile — the thickness of the frame visible from the front. In Canada, window manufacturers typically use either a 1.5-inch or a 3-inch frame profile.
| Window size | Surface area low vs high profile | Difference |
| 24 × 24 in. | Low profile glazing dimension 1.5in frame: ~441 sq. in. vs high profile glazing dimension 3in frame: ~324 sq. in. | ~27% less glass |
| 36 × 48 in. | Glazing dimension 1.5in frame: ~1,485 sq. in. vs glazing dimension 3in frame: ~1,260 sq. in. | ~15% less glass |
| 48 × 60 in. | Profile glazing dimension 1.5in frame: ~2,565 sq. in. vs profile glazing dimension 3in frame: ~2,268 sq. in. | ~12% less glass |
On smaller windows, choosing a low profile glazing dimension makes a noticeable difference because the extra 1.5 inches taken from all sides removes a bigger share of the surface area. On larger windows the gap shrinks, but a slim frame still means more daylight. At TotalSeal, our slim flat profiles use multi-chamber vinyl construction to keep the frame thin without losing thermal or structural strength.
“On a 24-inch-wide window, switching from a 3-inch frame to a 1.5-inch frame gives you almost 30 percent more glass. For north-facing rooms where you want to maximize natural light, that swap alone can change how a room feels.” — Dave Lawson, 20-year window installation technician, Toronto
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Standard sizes compared across window styles
Fixed windows are just one of many different window styles. Here is how their standard sizes stack up against other windows and doors options:
| Window type | Width range (in.) | Height range (in.) |
| Fixed / picture windows | 24–96 | 24–72 |
| Double hung windows | 24–48 | 36–72 |
| Single hung windows | 24–48 | 36–72 |
| Casement windows | 18–36 | 24–72 |
| Awning windows | 24–48 | 20–40 |
| Sliding windows | 36–84 | 24–60 |
| Bay windows | 42–126 (full unit) | 36–78 |
A few things stand out:
- Fixed picture windows have the widest maximum window sizes because there is no operable hardware limiting how large the glass can be.
- Double hung windows range from 24 to 48 inches wide and 36 to 72 inches tall, matching most bedroom and kitchen openings.
- Casement window sizes are narrower since each sash swings outward and must support its own weight.
- Common awning window sizes top out around 48 inches wide, making them a good pairing below or beside a large picture window.
- Sliding window sizes stretch wider than hung windows, which is why sliders are a favourite for basements and dens.
If you are comparing casement vs awning or wondering about awning vs sliding windows, the size ranges above should help narrow down which style fits your opening.
Minimum and maximum sizes to keep in mind
Every window has structural and manufacturing limits. Here are the boundaries most Canadian producers follow for fixed units:
- Minimum width: 12 inches (rarely smaller for residential use)
- Minimum height: 12 inches
- Maximum width: 96 inches (some manufacturers cap at 72 or 84)
- Maximum height: 72–84 inches depending on glass thickness and gas fill
- Maximum square footage per unit: typically 35–50 sq. ft., depending on whether you choose double pane or triple pane glass
When ordering, remember that both maximums cannot always be used at the same time. A window that is 96 inches wide may be limited to 48 inches tall to stay within the safe square footage.
How to pick the right size for your room
Choosing between standard sizes and custom sizes comes down to a few practical factors:
- Measure the rough opening first. Take three width readings (top, centre, bottom) and three height readings (left, centre, right). Use the smallest number in each direction, then subtract about ¼ inch for installation clearance.
- Match the window to the room’s purpose. Living rooms benefit from larger windows (48 × 60 or bigger) that flood the space with light. Bathrooms and stairwells work fine with 24 × 36.
- Check building codes. In Ontario, bedroom windows used as emergency exits must meet egress requirements — a fixed window alone cannot serve as an egress opening, so pair it with operable end vent windows or casement windows.
- Think about energy efficiency. Larger windows need better glazing. For window sizes in Canada that meet ENERGY STAR™ certified ratings in Climate Zone 3, look for double pane windows with Low-E coatings or triple pane glass with argon fill.
- Consider the existing frame. If your current opening is a standard size window, ordering a matching replacement avoids costly framing work during the installation process.”Always take accurate measurements from inside the frame, not outside. I have seen homeowners order new construction windows based on the window’s width as seen from the street — and end up with units two inches too wide.” — Sandra Nguyen, certified window installer with 15 years of field experience
Getting the most from your fixed windows
A few quick ways to get better results from your project:
- Pair a large picture window with operable units on each side. This gives you a wide view, plenty of natural light, and the ability to bring in fresh air when you want it.
- Choose a standard size window when possible. Custom sizes cost more and take longer to produce. Standard casement windows, hung windows, and picture window replacements ship faster.
- Ask about jamb extensions before ordering. The jamb connects the window frame to the wall casing. Standard sizes in Canada are 1.5, 2⅜, 3⅜, and 4⅝ inches — the right one depends on your wall thickness.
- Compare basic window components like brickmould, casing, and sill profile across quotes. These details matter for a clean, weathertight finish.
Whether you are replacing a single slider or outfitting an entire window wall with fixed vs picture windows, the right window measurements make all the difference. TotalSeal manufactures all standard and custom fixed window sizes in-house using multi-chamber vinyl frames, Cardinal Glass insulating units, and Roto multi-point locking hardware on operable companions — all built for the Canadian climate.
Ready to see what fits your home? Visit our showroom or request a free estimate from our team.
FAQ
What are the most common standard fixed window sizes in Canada?
The most popular fixed window sizes in Canadian homes are 36 × 48, 48 × 48, and 72 × 60 inches. These fit standard rough openings and suit bedrooms, living rooms, and open-concept spaces without any framing changes.
Can I order custom window sizes for a fixed window?
Yes. Most window manufacturers offer custom sizes for fixed units. Custom orders take longer to produce and cost more than standard sizes, but they let you match unusual openings or achieve a specific look.
What is the difference between a low profile and high profile glazing dimension?
A low profile frame is about 1.5 inches wide, while a high profile frame is roughly 3 inches wide. The thinner frame leaves more glass exposed, which increases natural light and the window’s visible surface area.
Do fixed windows meet ENERGY STAR™ certification in Canada?
Fixed windows can meet ENERGY STAR™ certified standards easily because they have no operable seals to leak air. With double pane or triple pane glass, Low-E coatings, and argon gas fill, fixed units often exceed the required U-factor for Canadian Climate Zone 3.
