When looking for new or replacement windows for your home one of the first things that you may think of is the windows size.
Windows, especially custom-made ones, can tally up the costs in any home renovation project. Lucky for homeowners, manufacturers have standard sizes to lessen the burden of crafting, manufacturing and installing windows.
But what are standard window sizes and what do you need to know before replacing or installing windows?
Quick Reference: All Standard Sizes
| Window Type | Width Range | Height Range |
|---|---|---|
| Double Hung | 24 – 48 in | 36 – 72 in |
| Picture | 24 – 96 in | 12 – 96 in |
| Bay | 42 – 126 in | 36 – 78 in |
| Sliding | 36 – 84 in | 24 – 60 in |
| Awning | 2 – 46⅛ in | 20 – 92⅞ in |
| Casement | 14 – 35½ in | 29½ – 77½ in |
Standard Window Sizes: Detailed Guide
Double Hung Windows
Double-hung windows are the most common window types in homes across the country. Since these windows are so popular, double-hung windows come in many different standard sizes.
Width: 24 – 48 in | Height: 36 – 72 in
Picture Windows
Big, broad, and beautiful, picture windows are ideal for rooms with a scenic view and lots of wall space that can improve your home's curb appeal. They have a level of architectural appeal that other window types cannot match. Most picture windows don't open, but they do come in multiple standard sizes to fit in any home.
Width: 24 – 96 in | Height: 12 – 96 in
Common, standard widths for picture windows are:
- 24 in
- 36 in
- 48 in
- 60 in
- 72 in
- 96 in
Popular and standard heights for picture windows include:
- 18 in
- 24 in
- 36 in
- 48 in
- 52 in
- 60 in
- 62 in
- 72 in
- 84 in
- 96 in
Bay Windows
Similar in a sense to a picture window, a bay window can really open up your home. Bay windows offer more unique architectural traits than a standard, double-hung window, filtering in much more light like that of a vast picture window. They're more appealing, due to their ornate features that traditionally come with their design and because they are quite large.
Width: 42 – 126 in | Height: 36 – 78 in
Sliding Windows
As their name suggests, slider windows open back and forth on a track, making for an excellent style in a small space that requires easy ventilation, like above a kitchen sink or in a small bathroom. These windows are notably wider than they are taller.
Width: 36 – 84 in | Height: 24 – 60 in
Common and standard sliding window widths are:
- 36 in
- 48 in
- 60 in
- 72 in
- 84 in
Standard heights for sliding windows are:
- 24 in
- 36 in
- 48 in
- 60 in
Awning Windows
Offering plenty of ventilation like its cousin style (casement window), the awning window is hinged at the top and opens outward. Open your awning window during a light rain and the weather won't bother you as these windows are considered virtually weatherproof.
Width: 2 – 46⅛ in | Height: 20 – 92⅞ in
Casement Windows
Casement windows are styled to open from the side and are ideal for areas of the home that require a little extra help ventilating, like a kitchen or a bathroom.
Width: 14 – 35½ in | Height: 29½ – 77½ in
Measuring & Sizing Basics
How Window Sizing Notation Works
Manufacturers simplified the entire replacement window sizing process to help homeowners like you find the standard window sizes needed for a home. The window size notation is the combined width and height. A "2426" replacement window has a width of 2-feet 4-inches and a height of 2-feet 6-inches.
A side note to these measurements is that a manufacturer adds a half-inch to these measurements, giving them plenty of room for installation. If your window notation indicates a 44-inch x 44-inch opening, it probably measures 43½-inches x 44½-inches in actuality.
The half-inch adjusts for room on either side of the window for flashing materials and for it to operate properly.
Understanding the Rough Opening
When measuring a window to determine the standard size, you'll need to find out what the rough opening is. The rough opening, by definition, is the measurement from the inside of one side of the window frame to the other.
This is how manufacturers find the standard size of your window, and they'll deduct that half-inch for the flashing to be installed and the window to be made plumb.
There are a lot of window styles and sizes out there, but measuring them to find their correct, standard size is a consistent process across the board. Knowing what standard size windows your home has will make it all the easier to find and purchase replacement windows from a manufacturer when the time comes.
Leave the Window Measurements to the Professionals
Feldco has been serving Midwest homeowners for decades, helping families find the right replacement windows for their homes. Whether you need to replace a single window or outfit your entire house, no job is too small or too large for our team.
We carry a wide selection of window styles — double hung, picture, bay, sliding, awning, casement, and more — so you can find the perfect match for every room. And if standard sizes don't fit your openings, Feldco also offers custom-sized windows built to your exact measurements.
Our professional measurement technicians are trained to precisely measure your windows so you can benefit from a perfect fit and high energy efficiency. Don't leave window measurements to chance — let the experts handle it. Speak to a product specialist and get a free quote online today.
866-4FELDCO