Standard Size of Window


Standard Size of Window

The standard size windows: The most common size in the US varies by window type.

The most common window type is double-hung, typically 24 and 48 inches wide and 36 and 72 inches wide.

Standard sizes of sliding windows range from 36 inches to 84 inches in width and 24 to 60 inches in height.

What Is a Window?

What Is a Window

A window is an opening in a wall or roof usually covered by a frame and glass or another transparent material to allow light to enter a building.

Windows are for light, external view, ventilation, and fire escape.

I am unaware of a building department jurisdiction that does not mandate windows for residences.

also read: Window Replacement Companies

What Is a Standard Window Size?

What Is a Standard Window Size?

Standard window sizes, or standard window dimensions, are made to fit most household window frames and are also suited to a wide range of customizations within your home.

Manufacturers usually provide this size as a standard size for most homes.

Standard window sizes are often overlooked when it comes to home improvement. And most people assume that any window will do, but this is not the case.

Specific window sizes are best for different rooms in your home.

We take windows for granted because they are a part of our home. The width of a standard window depends on what type of window it is.

For example, a typical bedroom window is 24 by 36 inches, with various larger sizes.

The most common standard window measurements in the United States are 3 feet by 5 feet, 4 feet by 6 feet, 5 feet by 6 feet, 6 feet by 6 feet, and 6 feet by 8 feet.

They are enhanced with double-hung windows. However, measurements are not displayed in inches when window shopping.

However, your view of the outside world significantly affects the quality of your life and is offered in window sizes suitable for most homes.

If you know the type of window you want, it’s just as helpful as knowing its size.

The standard size window specification combines width and height. Therefore, a 24-inch by 36-inch window would read 2436.

The actual window size is ½ inch less than the full notation. In this case, the measurements would be 23 ½ inches by 35 ½ inches because the manufacturer adds ½ inch for easy installation.

Home improvement and some window retailers carry identified absolute numbers for standard-sized rough openings.

Interior doors have a different set of variations. There are several essential points to consider when deciding on standard door sizes.

First and foremost, you must determine if it is an interior or exterior door. Standard window sizes are dimensions that fit most newly constructed homes.

The window manufacturers offer several widths and heights based on the style of the window.

But knowing that many manufacturers, dealers, and contractors use this system for windows and doors will help avoid feeling caught off-guard.

They return when looking for new windows for your home. One of the first things you may think of is the size of the windows.

Same as a standard in-stock window. Just because a window is a standard size does not mean that the window is in stock and warehousing.

At Pella, we offer standard window sizes commonly found in many homes.

If it is an exterior door, the most common standard maximum height is 96 inches. The width can also vary between 30 to 32 inches.

There is also an optional external door option with a maximum height of 92 inches with tread widths ranging from 24 to 48 inches.

Exterior doors are made of more robust, resilient materials to withstand the elements and avoid the external temperature from affecting the environment.

Shopping for windows does not discover a standard size in your local hardware store. There are standard window sizes for every home.

Classic interior doors were 80 inches tall. Internal door widths come in several standard sizes starting at 24 inches.

Additional widths of 28, 30, 32, and 36 inches are standard sizes. The average thickness of interior doors in Canada is 1 and 3/8 inches.

also read: 10 Types of Doors | 18 Types of Interior Doors | 7 Types of Exterior Doors

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The Types of Windows

The Types of Windows

  1. Single-hung windows.
  2. Double-hung windows.
  3. Casement window.
  4. Sliding window.
  5. Bay window.
  6. Awning window.
  7. Arched window.

1. Single-Hung Windows:

Single-Hung Windows

Single-hung windows, or single window size, look similar to double-hung ones, but only the bottom sash is functional.

Single-hung windows have been among most homes’ standard bedroom windows for decades.

However, like double-hung windows, some single-hung window models will allow you to redirect the belt inward to clean the exterior.

Single-hung windows are more robust than double hung windows bend or double-hung windows because they have a fixed rail in the middle of the frame.

Single-hung windows are easy to clean and flush with the wall.

Therefore, this type of window is great for walkways and patios.

A fixed window that opens and does not close. These are measured from 24 and 48 inches.

While the rough opening width of a single-hung window is as small as 24 inches, the rough opening can be as large as 48 inches.

Single-hung windows can be as small as 36 inches and as large as 72 inches in height. Because single-hung windows are economical and energy efficient, this window type is perfect for any budget.

2. Double-Hung Windows:

Double-Hung Windows

The main difference between single and double-hung windows is that they do not have fixed glass panes. The most common type of replacement window is the double-hung window.

These windows come in various sizes and are designed to fit almost any rough opening. Instead, both sashes of a double-hung window open in the same way as a single-hung window.

However, these sashes can move and open independently.

One of the double-hung bedroom window sashes can also be turned inwards, making cleaning easier.

Standard double-hung windows are between 24 and 48 inches wide.

Standard standard single hung window sizes range between 36 and 72 inches in approximate height.

Double-hung windows are often used in kitchens, bedrooms, hallways, and throughout the home. Double-hung windows vary in size.

3. Casement Windows:

Casement Windows (1)

A casement window is a movable window made of a wood or metal frame; These windows are attached to hinges or pivots on the upright side of the structure and open to the left or right like a door.

Casement windows typically start at 17 inches wide and range up to 41 inches. The average height ranges from 16 inches to 33 inches.

These windows move horizontally inwards and outwards like doors.

These windows are great for ventilation, so that you can place them in the kitchen or bathroom for efficiency and natural light.

Standard casement window sizes range from 12″ inches to 24″ inches in width and 24″ inches to 84″ inches in height.

4. Sliding Windows:

Sliding Windows (1)

One of the most common window types in homes. Sliding windows suit a variety of rooms, including kitchens, bedrooms, bathrooms, basements, and other areas.

However, avoid sliding windows in rooms that require protection from the elements such as wind, dust, or other contaminants.

A sliding window will open from side to side instead of up and down like a double-hung window.

Sliding windows are easy to operate, but sliding window sizes are unique.

Window sizes will be more comprehensive than other types because of how they function.

They are equally valuable, working well in bedrooms, kitchens, and bathrooms. Some homeowners will replace single-hung window sizes with sliding windows.

Homeowners can purchase off-the-shelf standard size house windows dimensions for common rough slots.

For sliding windows, the standard widths available are 36, 48, 60, 72, and 84 inches.

And regarding the height, they only have limited options of 24, 36, 48, and 60 inches.

5. Bay Windows:

Bay Windows (1)

Bay windows are similar to picture windows in that they are more prominent, and their primary functions are light and aesthetics, but they also come in standard window dimension.

However, bay windows often feature bi-hung or casement windows open to airflow.

Bay windows are a great addition to any bedroom, providing a stunning viewing area of any scenery.

Bay windows usually have three windows, a sizeable center-picture window, and two smaller windows on either side.

The two side windows are the same height and half the width as the middle window but can increase or decrease in width depending on preference.

Side windows are the ones that usually open for fresh air.

Like picture windows, two come in standard window sizes:

  • Bay windows are typically relatively expansive in width, ranging from 42 inches to 126 inches by 3 feet and 6 inches to 10 feet by 6 inches.
  • Standard bay window heights range between 36 inches and 78 inches.

The final combination of all these beautiful types of bedroom windows should be two. The two windows approach from different angles.

Some are more hexagonal, while others are more square.

But generally, they are about 12 to 14 inches deep with a 30-degree bend but can go up to 60 degrees which is 16 to 22 inches deep.

A bay window is built as an add-on to an existing wall. Flush with the wall.

Two windows add depth to exterior walls and make your bedroom less boxy.

6. Awning Windows:

Awning Windows (1)

Awning windows are the most suitable ones. Awning windows are similar to casement windows with unique shapes to replace standard ones.

Awning windows are hinged at the top and open outwards and upwards.

These windows are great for hard-to-reach bathrooms and kitchen areas, such as upper countertops, cabinets, or sinks.

Awning windows are much more comprehensive than they are tall. It is excellent for areas with a lot of rain because it opens when it rains.

Awning windows are best for those who prefer to keep their windows.

Awning windows are hinged at the top and extend outwards. Hinged at the top and open outward, awning windows are usually more expansive than tall.

The widths available are from 2 to 46 inches, and the heights range from 20 to 92 inches.

Standard awning window sizes are as follows.

  • It was 3 feet wide by 2 feet tall (3020).
  • It was 4 feet wide by 2 feet 4 inches tall (4024).
  • It was 5 feet wide by 3 feet tall (5030).

also read: 18 Different Types of Windows

7. Custom Window:

Custom Window

Two options are available if you can’t find the window that best suits your home.

You can adjust the size of your wide opening to accommodate a standard window size.

This is often the best option if the adjustment is easy enough.

If our guide detailing all available window sizes still needs to provide a solution for your home, custom window sizes are worth considering.

Expect custom windows to be slightly more expensive than what are standard window sizes.

Also, be prepared to do more work on framing, trim, and finishing details when installing non-standard-sized windows.

Another option is to order custom windows through a supplier. The supplier will help you determine the best options available.

Additionally, these windows will cost a bit more than standard windows, so accommodating rough openings is the best option.

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Frequently Asked Questions (FAQ)

Standard Size of Window

The most common window type in the U.S. are double-hung windows, which are typically between 24 and 48 inches wide and 36 and 72 inches tall.

What Is a Standard Window Size?

For sliding windows, another popular type, standard sizes usually range from 36 inches to 84 inches in width and 24 inches to 60 inches in height. These windows slide horizontally to open and close.

Average Window Size

The most common window size in the U.S. varies by window type. The most common window type in the U.S. are double-hung windows, which are typically between 24 and 48 inches wide and 36 and 72 inches tall.

Typical Window Sizes


  • 2 feet 6 inches (30 inches)
  • 3 feet (36 inches)
  • 3 feet 6 inches (42 inches)

Standard Double Hung Window Sizes

Single-Hung/Double-Hung Windows:

  • Width: 2 feet 6 inches (30 inches), 3 feet (36 inches), 3 feet 6 inches (42 inches), 4 feet (48 inches)
  • Height: 5 feet (60 inches), 6 feet (72 inches), 8 feet (96 inches)

What Is a Window?

A window is an opening in a wall or roof of a building that allows light, air, and sometimes sound to pass through. It is typically covered by transparent or translucent materials, such as glass or plastic, which provide a view of the outside while still maintaining a barrier between the interior and exterior of the building.

Types of Windows

4 Different Types Of Windows

  • Double-Hung Windows.
  • Casement Windows.
  • Awning Windows.
  • Bay or Bow Windows.

Double Hung Window Sizes

double-hung windows can vary based on the manufacturer, region, and specific requirements. However, here are some common double-hung window sizes:


  • 2 feet (24 inches)
  • 2 feet 6 inches (30 inches)

Sliding Window Size

Standard horizontal sliding window sizes come in 36-inch, 48-inch, 60-inch, 72-inch and 84-inch versions. Standard vertical sliding window sizes come in 24 inches, 36 inches, 48 inches and 60 inches tall. Sliding window sizes can be custom ordered and made to fit spaces a traditional double hung window might not.

Bay Window Sizes

Bay windows typically come in standard sizes ranging from 3 feet 6 inches to 10 feet 6 inches in width and from 3 feet to 6 feet 6 inches in height. A standard-size window is generally less expensive, and they are often readily available.

Awning Windows Sizes

A standard size awning window would have a width from 2 feet to 3 feet, 10 inches and a height from 1 foot, 8 inches to 7 feet, 8 inches high. Be sure to get awning window size recommendations from a local window professional to ensure the new awning windows fit your home and needs.


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