Correct sizing and knowledge of standard sizes matter a lot when building a new house.

While you could always choose a custom option, standard window sizes make things convenient.

Standard window sizes help ensure that your windows fit comfortably and securely in their allotted space.

Are you currently shopping for windows? Not sure about what size you need?

This blog post will cover all the standard window sizes for different types of windows to help you make an informed decision. Keep reading to learn more.

What are Standard Window Sizes?

If you have recently explored market options for your house's windows, you must have noticed one odd thing. No matter how different the styles and designs are, most windows are similar in size.

In fact, most designs follow a sophisticated sizing pattern. There are two reasons behind it.

The first one is standard windows are easier to install and maintain than custom-sized ones. You don't need to make any alterations in the frame or walls, and there are reduced chances of misfitting.

Second, standard window sizes make it easier for window manufacturers to keep the cost low. Since they have a consistent size pattern, they can create frames in bulk and pass on the cost savings to customers.

But what if your home happens to have windows that are outside of the standard range?

In that case, you may have to pay a premium cost for custom windows. We'll talk about that in detail later.

For now, let's take a look at the most common window sizes available in the market.

Casement Window Sizes

Casement windows are hinged on one side and open outward, like a door. While most casement windows come in pairs, you can choose to have a single casement window if you want.

These are used when you want to enjoy a wide view of the outdoors but have other benefits too. For example:

• Easy installation

• Better security

• Low maintenance

• High energy efficiency

• Great ventilation

• Flexible opening capabilities

Casement windows are usually made from wood, lite wood, vinyl, or aluminum.

Standard Size:

When it comes to size, casement windows are usually available in the following dimensions:

Width: 1 foot 2 inches to 2 feet 11.5 inch

Height: 2 feet 5.5 inches to 6 feet 5.5 inch

However, the most commonly available sizes in the market are:

• 24.125 in. x 48 in.

• 29 in. x 47 in.

• 30 in. x 48 in.

• 24 in. x 36 in.

The width of the frame is usually 4.5625-in.


Depending on your window's brand, material, and size, a casement window can cost anywhere from $250 to $450.

Sliding Window Sizes

Sliding windows are popular among homeowners because they take up less space than casement windows.

They open and close horizontally on a track system, which is why they are also termed 'gliding windows' or gliders.

Some of the key benefits sliding windows offer are:

• Easy operation

• Panoramic views

• Natural light

• Highly energy efficient

• Good ventilation

Sliding window frames are usually made from vinyl or aluminum.

Standard Size:

Sliding windows come in many different sizes. The most common ones are:

Width: 36 in, 48 in, 60 in, 72 in, 84 in

Height: 24 in, 36 in, 48 in, 60 in

The most common sliding windows standard sizes are:

• 35.5 in. x 35.5 in.

• 47.5 in. x 35.5 in.

• 48 in. x 48 in.

• 47.3125 in. x 35.5625 in.

The frame's width can range from 1.31 into 4.56 in


Depending on the brand, material, and size of your window, a casement window can cost you anywhere from $250 to $700.

Double Hung Window Sizes

Double hung windows are some of the most popular types of windows because they are easy to use, secure and weather-resistant.

They come with two movable sashes, which open and close up or down. The top sash opens while the bottom one stays in place.

Double Hung windows also offer great ventilation since you can operate both sashes simultaneously.

Overall, double hung windows are great because of the following:

• Easy to use

• Easy maintenance & cleaning

• More design options

• More ventilation

• Safe (for children)

Double hung window frames are usually available in wood and vinyl.

Standard Size:

As far as size is concerned, double hung windows’ width ranges from 24 in. to 48 in., while height varies from 36 in. to 72 in.

The most famous brands offer the following sizes:

• 33.625 in. x 56.875 in.

• 35.5 in. x 65.5 in.

• 35.5 in. x 71.5 in.

• 48 in. x 48 in.

The width of the frame ranges from 2.95 in. to 4.5 in.


The price of a double hung window could range from $150 to $700 depending on frame material, size, and installation charges.

Custom Size Windows

When you can't find a well-fitting standard-sized window, you have two options.

First, you can adjust the wall openings to match the window size. This requires professional help and can be expensive.

Second, you can opt for custom size windows. These are made according to the exact size of your opening and provide the best fit.

Custom-size windows are available in various materials, such as vinyl, aluminum, and wood. However, when it comes to preference, the frames are usually made from vinyl because it is more customizable.

The cost of custom size windows depends on the size and material used. It can range anywhere from $250 to $1,500.

The process is simple. You will get in touch with a local window manufacturer and get them to measure the opening sizes on-site. They will then quote their prices for different materials, and you can decide which one best fits your needs.

Once the windows are manufactured, they will be delivered to your home and ready to be installed. The installation process is usually simple and can be completed in a few hours.

Installation of custom size windows can be expensive and requires some extra work, but it is worth it in the end if you want a beautiful and perfectly fitting window.

Bottom Line

In conclusion, casement, sliding, double hung, and custom-size windows are popular choices when it comes to choosing the right window sizes for your home.

There are many factors to consider, such as size, material, cost, and installation process. Make sure you take all of these into account before selecting the right window sizes for your home.

November 26, 2022 — Della Wang