Standard Window Sizes for Different Window Types

When buying windows for your new or old house, you should pay attention to window sizes. Although you can buy a custom window to occupy any frame, getting a standard window size make the process less costly and simpler.

What are Standard Windows?

Standard-size windows are those windows available in consistent size dimensions. They are tailored to fit into most rough openings in your home. They may only be suitable for some window replacements, but it is only wise that manufacturers produce windows that will be functional in most homes. If you do not want to spend large amounts of money on custom windows, always use standard window sizes whenever possible.

What Window Sizes Should You Get?

To help you easily identify the correct size for your rough opening, manufacturers use a size notation for replacement windows. This notation combines a window's height and width. The first two digits denote its width, while the last two indicate its height. Also, the dimensions can be in inches or feet. For example, a 2426 replacement window has a 2'4" width and a 2'6" height. However, the window's actual dimensions are usually ½ inch less than the whole number indicated. For instance, a window labeled 44" x 44" actually measures 43 ½" x 43 ½”. This is because manufacturers add extra inches to ensure easy installation.

The window dimensions you opt for will also impact the window installation cost. Below are the different types of windows with their standard sizes.

Double-hung Windows

These windows have a lower and upper sash, both of which move upwards and downwards. The top sash often stays in position and the lower sash can be opened to allow air entry.

Where They are Used

A common and versatile option, double-hung windows work for many homes. They are often found in common areas, the bedroom or any other room that could benefit from openable windows. You can install these windows on any floor as they are cleaning them from inside the house is easy. On the other hand, single-hung windows are ideal for the ground floor to allow easy access for maintenance and repairs.

Standard Sizes

These windows are usually longer than they are wide. The width of these doors ranges from 24 to 48 inches, while their height ranges from 36 to 72 inches. Their cost ranges from $150 to $700 depending on the size, frame material, and labor cost.

Sliding Windows

Sliding windows have horizontally sliding slashes. One sash could be held in position while the other sash could be openable if both could be mobile.

Where They are Used

You can use these windows almost anywhere in your house, including the bedroom, common areas, dining room, kitchen, bathroom, and basement.

Standard Sizes

These windows are usually wider than they are tall. The available widths are 36, 48, 60, 72, and 84 inches, and the available heights are 24, 36, 48, and 60 inches. Depending on their material and dimensions, you can find sliding windows at $250 to $700 per window.

Picture/ Fixed windows

These windows are fixed in place with no moving parts. Therefore, they can neither open nor slide. Picture or fixed windows are designed to improve the aesthetics of your home and allow for more natural light.

Where They are Used

Picture windows are suitable for areas that do not require openable windows for cleaning and fresh air. They are commonly used in the kitchen, living room, and any place you want to let in as much natural light as possible.

Standard Sizes

Picture windows are commonly found in widths of between 24 to 96 inches. Standard picture window heights range from 12 to 96 inches. Smaller windows range from $210 to $225 per window. However, most homes have larger picture windows for an expansive contemporary look. Depending on your budget and aesthetic needs, you can get these in custom sizing.

Casement Windows

These are hinged windows opening from the side. Casement windows are ideal for homes in warm climates reliant on the breeze for comfort and ventilation all year round. In addition, they do a better job than single- or double-hung windows in ventilation.

Where are They Used?

Casement windows are ideal for the bathroom or kitchen owing to their ventilation properties. They are also suitable for people experiencing movement difficulties and hard-to-reach areas, like behind the kitchen sink. Why? You need not strain to slide the sash. Instead, all you have to do is unlatch before turning the crank.

Standard Sizes

Common casement window widths range from 17 to 41 inches. Heights start from 16 to 33 inches. As for pricing, the cost of each window begins from $250 upwards, depending on the size.

Bay Windows

Besides opening up your space, bay windows bring architectural detail to your home and let in natural light. Installing a bay window in a room instantly transforms it making it appear bigger and more magnificent.

Where are They Used?

They are often found in a home's large rooms, such as the bedroom and living room. Bay windows significantly improve your home and are a worthy investment.

Standard Sizes

Bay window widths start from 42 to 126 inches. Their heights begin from 36 inches up to 78 inches. However, if you want the larger option, consider custom-sized bay windows but remember you’ll have to incur up to $1500 per window.

Awning Windows

Awning windows have their tops hinged and open outwards to allow sufficient ventilation. They are waterproof and can be used alongside other window styles.

Where are They Used?

Awning windows are commonly found in the kitchen, bedroom, bathroom, living room, and basement.

Standard Sizes

Generally, standard awning windows have a width of 24 to 46 inches and a height of 20 to 92 inches.

Custom Size Windows

Say you can’t find a window to fit into the rough opening in your home. You will have two options: either adjust the opening’s size or order a custom window. You will be asked ‘to submit the window dimensions and select your desired glass and frame material. Once you have placed your order, give the manufacturer a few weeks before your shipment arrives. Older homes are known for requiring custom-sized windows. They were constructed before the era of modular window production, so their windows may have odd dimensions.


Thanks to technological advancements, homeowners are no longer limited by standard window sizes. You can select any size you desire and have a manufacturer produce it. While at it, remember that you’ll have to incur extra costs than you would have had you gone for standard window sizes.