Standard Window Sizes For Every Home

Finding out the standard window sizes may sound as easy as looking at the windows available at hardware stores near you. But the standard window sizes can mean a lot of different things depending on what kind of window you want. 

standard window sizesImage from smithandvansant

For example, knowing the standard window size for a window above your sink isn’t going to be helpful if you want a living room picture window. So knowing the standard window types is just as helpful as knowing the standard window sizes. 

What Are The Standard Window Sizes?

While there isn’t a set size for windows, there are a few standard window sizes that you can find almost anywhere.  The standard window size for regular windows is 24″ wide by 36″ tall. But this is just one number. 

When it comes to windows, there are a lot of different types of windows and a lot of different sizes of windows. You need to find out the size you need for your window and what type of window you are looking for.

After you know the type of window that you need, you can figure the size that you need. But if you are adding a new window, you can get the window and then cut the frame. However, replacing windows is quite different. 

what is a standard window size

How To Find What Size Of Window You Need

The most important window size is the window size that you need. When measuring for a window replacement, try measuring your opening instead of your window. Because measuring a window can be difficult.

There are moisture barriers, lips, and all sorts of protrusions that can confuse you. So just measure the window opening and write down the measurements. Measure the jamb from side to side and end to end. 

This is the measurement you’ll give the manufacturer or associate at the hardware store. If you want to pick one out yourself, then you will need to deduct 1/2 in from the measurement for the window to fit.

This is something that associates and contractors do automatically but is something you’ll do manually. It’s better for the window to be slightly too small than too big. Because you can always fill in the gap.

A great option for filling gaps is caulk or silicone. Here we have a great guide on the difference between caulk and silicone where you can learn the basics on how to use each of them. 

Burglar-Proof Windows

standard double hung window sizes

This is something that a lot of people forget about. The type of window and size of the window that you get matter. In more than 70% of home break-ins, the burglars break through the window or door by breaking the glass.

While getting an alarm system is the best way to protect your home, locks won’t do too much good if your window is easy to break. Here are a few options you can get to protect your home from intruders. 


Glazing is a simple clear coat that can add protection and security to your window. Double-glazed windows are very hard to break into and are one of the cheapest anti-burglary options that really work. 

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A security window film is another great option. You can add it to your window and it won’t be visible to the naked eye. But it offers great protection that doesn’t allow burglars to gain entry after breaking the glass. 


Getting riot glass, or even something less secure is your safest option. This way, they won’t be able to break the glass at all. However, unbreakable glass is very expensive so it may not be your easiest decision to make. 

If you’re looking for security systems, then make sure you get a good one. Security systems aren’t always cheap, but it is best to get your info from third-parties rather than the company themselves who will be partial. 

Types Of Windows

Types Of Windows Size

The size of windows generally depends on the type of window that you are referring to. There are a lot of different types of windows you can get. Each of them has different standard window sizes. Here are a few examples. 

Single-Hung Window

Width: 36 to 84 inches

Height: 24 to 60 inches

A single-hung window size has a single movable sash. The sash is pulled up from the bottom to let air in. But the top of the window never moves. This is the cheapest and most common type of window and is the “standard window” type 

Double-Hung Window

Width: 36 to 84 inches

Height: 24 to 60 inches

Double-Hung windows have two operating sashes. Both the top and bottom can move so you can let air in from either end. This offers more ventilation options. This type of window is expensive but very valuable. 

Awning Window

Width: 12 to 96 inches

Height: 12 to 60 inches 

Awning windows are actually wider than they are tall. They are hinged on the top and open outward from the bottom. They are great for areas that get a lot of rain because they can be opened when it’s raining. 

Bow Window

Width: 1 to 6 windows wide

Height: 1 window tall

Bow windows are actually multiple windows put together. But they do differ from bay windows. Bow windows are three windows wide on most occasions while bay windows are made to be round, so they take more windows. 

Arched Window

Width: 24 to 192 inches

Height: 24 to 192 inches

This Victorian-style window is round at the top. They don’t come in standard sizes because they are often custom-made. You can find gigantic arched windows are tiny ones used in bathrooms and painted as stained glass 

Casement Window

Width: 12 to 36 inches per window

Height: 24 to 84 inches per window

Casement windows are ancient windows used to provide full ventilation to a room. The hinges move on the vertical side of the window and they open like French doors. They are both affordable and high-end. 

Egress Window

Width: At least 20-inches 

Height: At least 24-inches

These windows are often found in basements and offer an escape in an emergency. Hence the name, egress, which means escape or leave. They have to be a certain size to accommodate most humans trapped in dire situations. 

Glass Block Window

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Width: 4 to 8 inches per block

Height: 4 to 8 inches per block

These windows are usually made block by block and aren’t generally sold as whole windows. So standard window sizes don’t apply. These blocks are often used for other reasons too, such as building shower walls. 

Garden Window

Width: 36 to 72 inches

Height: 24 to 48 inches

Garden windows are convex windows that protrude from a wall. They offer a great place to display treats and indoor plants. They are perfect for growing plants indoors, especially kitchen plants like herbs and vegetables. 

Jalousie Window

Width: 12 to 36 inches

Height: 24 to 48 inches

Jalousie windows are very rare and can only be found in mild climates. They are similar to glass blinds that have panels you can fold in to close or open them up to let air in. They are dangerous in cold, hot, and stormy climates. 

Transom Window

Width: copies window size

Height: 6 to 24 inches

A transom is a horizontal beam that divides a window’s upper part to offer more light. These windows are the same width as the window, or door, below but are much shorter. They are similar to clerestory windows. 

Hopper Window

Width: 14 to 50 inches

Height: 12 to 60 inches

A hopper window is an awning window that opens from the bottom instead of the top. While awning windows let air in without letting rain in, hopper widows let the smoke out. So they are perfect for kitchens.

Clerestory Window

Width: Any

Height: Any

Clerestory windows come in all shapes and sizes. Any window can be used as a clerestory window, though oftentimes, custom windows are made. Check out this clerestory window guide for more info. 

Picture Window

Width: 28 to 52 inches

Height: 12 to 96 inches 

Here we have another highly customizable window that doesn’t have any panes or a window frame. It is used to get the best view of your yard or landscape. They are often made with thicker glass, or perhaps even plexiglass. 

Circle Window

Width: 24 to 36 inches

Height: 24 to 36 inches

A circle window is the same diameter no matter how you measure them. They can be found in most sizes, though they tend to be smaller rather than larger. They are gorgeous accent windows for any room. 

Skylight Window

Width: 20 to 60 inches

Height: 20 to 84 inches

Skylight windows are expensive windows that give you the most amount of light each day. They are installed on top of your house in the ceiling. This makes them less safe than other windows, but much nicer. 

Can I Get A Custom Window?

Yes! Custom windows are more expensive than pre-built windows. But you can order them from most hardware stores and definitely from most contractors who have connections in most industries. 

When you do get a custom window, it’s a good idea to have a contractor work with you to find the best window sizes for your home. If you’re going to go for it, you might as well make the most of it and enjoy that sunlight. 



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