What are standard window sizes?
If you’re replacing your home’s windows, it’s easiest to select standard sizes. Standard windows are built to fit common window openings and are more cost-effective than custom options. As manufacturers started mass-producing window frames and glass materials in the mid-1900s, it became beneficial to develop standard window sizes. Stricter building codes developed at that time also helped standardize window size. You can find new construction windows in standard dimensions if you’re building a new home, making replacement easier when the time eventually comes.
The size of window you need depends on which type of window you’re installing and the dimensions of the opening. You can read our guide on how to measure windows to determine the right sizes. Patriot Windows & Doors can also help you measure your window dimensions.
What window size do you need?
The size of the window you need depends on a few things. First, the window size required depends on what kind of window project you have. Windows for new homes should be sized based on the rough opening in the wall, while replacement windows can be sized based on the size of the window currently installed.
For either of these projects, we recommend to contact Patriot Windows & Doors. One of our trained technicians will have more experience measuring windows, fitting them in your home and sealing them to maximize energy efficiency.
If you’re comfortable measuring for a replacement window yourself, you can simply use a tape measure to get the width. Measure from the inside of the side jambs at the bottom, middle and top of the opening, and then take the smallest measurement.
For the window height, measure from the inside of the head jamb at the top of the window down to the sill. Take three measurements across the opening again, and settle on the smallest one.
Finally, you can provide your dimensions to us and we will provide you with a free estimate on replacement cost.
Houston's #1 Window & Door Installation Team
Double-Hung Windows
Double-hung windows are one of the most common window types. They have two sashes, both of which can move up or down to open. These windows fit every home style and are best for common areas, bedrooms, or any room that can benefit from windows that can open.
Double-hung windows are always taller than they are wide. Their widths range from 24 inches to 48 inches. Their heights range from 36 inches to 72 inches.
| DOUBLE HUNG WINDOW | AVG WIDTH RANGES | AVG HEIGHT RANGES |
|---|---|---|
|
Single Double-Hung Window |
24 to 48 inches (2 to 4 feet) |
36 to 72 inches (3 to 6 feet) |
|
Double Double-Hung Window (side by side) |
54 to 102 inches (4 feet 6 inches to 8 feet 6 inches) |
36 to 72 inches (3 to 6 feet) |
|
Triple Double-Hung Window (side by side) |
84 to 156 inches (7 to 13 feet) |
36 to 72 inches (3 to 6 feet) |
Single-Hung Windows
This style of window has one inoperable sash — usually on the top — and one operable one — usually on the bottom. These windows used to be found all throughout homes, but they have lost popularity to double-hung windows that provide more flexibility for ventilation and an easier cleaning process.
| DOUBLE HUNG WINDOW | AVG WIDTH RANGES | AVG HEIGHT RANGES |
|---|---|---|
|
Single Double-Hung Window |
24 to 48 inches (2 to 4 feet) |
36 to 72 inches (3 to 6 feet) |
|
Double Double-Hung Window (side by side) |
54 to 102 inches (4 feet 6 inches to 8 feet 6 inches) |
36 to 72 inches (3 to 6 feet) |
|
Triple Double-Hung Window (side by side) |
84 to 156 inches (7 to 13 feet) |
36 to 72 inches (3 to 6 feet) |
Casement Windows
Casement windows are hinged on one side and open to the left or right, similar to a door. These windows are great for ventilation, so you can place them in kitchens or bathrooms for functionality and natural light. Casement windows commonly start at 17 inches wide and range up to 41 inches. Common heights range from 16 inches up to 33 inches.
| CASEMENT WINDOW TYPE | STANDARD WIDTH | STANDARD HEIGHT RANGES |
|---|---|---|
|
Single Casement Window |
19 to 38 inches (1 foot 7 inches to 3 feet 2 inches) |
16 to 78 inches (1 foot 4 inches to 6 feet 6 inches) |
|
Double Casement Window |
40 to 78 inches (3 feet 4 inches to 6 feet 6 inches) |
36 to 78 inches (3 feet to 6 feet 6 inches) |
|
Triple Casement Window |
61 to 118 inches (5 feet 1 inch to 9 feet 10 inches) |
36 to 78 inches (3 feet to 6 feet 6 inches) |
|
Quadruple Casement |
82 to 158 inches (6 feet 10 inches to 13 feet 2 inches) |
36 to 78 inches (3 feet to 6 feet 6 inches) |
|
Two Casement Windows (Included in a Bay Window) |
48 to 120 inches (4 to 10 feet) |
36 to 78 inches (3 feet to 6 feet 6 inches) |
Picture / Fixed Window
Picture windows, also called fixed windows, remain in place and have no sash or hardware for opening. You should place picture windows where you won’t need to open the window for fresh air. These windows are best for living rooms and areas where you want to maximize natural light and showcase your view.
Picture windows can be as narrow as 24 inches or as wide as 96 inches. Their heights range from 12 inches to 96 inches.
| PICTURE WINDOW TYPE | STANDARD WIDTH | STANDARD HEIGHT RANGES |
|---|---|---|
|
Standard Rectangular |
36 to 96 inches (3 to 8 feet) |
48 to 96 inches (4 to 8 feet) |
|
Standard Square |
36 to 96 inches (3 to 8 feet) |
36 to 96 inches (3 to 8 feet) |
|
Arched |
36 to 96 inches (3 to 8 feet) |
48 to 96 inches (4 to 8 feet) |
|
Round |
24 to 48 inches in diameter (2 to 4 feet) |
24 to 48 inches in diameter (2 to 4 feet) |
Sliding Windows
As the name suggests, sliding windows have one or more operable sashes that slide laterally inside tracks to provide ventilation. They work for various home styles and rooms, including living rooms, bedrooms, bathrooms, kitchens, dining areas, and basements. Sliding windows are wider than they are tall. These windows range from 36 inches to 84 inches wide and 24 inches to 60 inches tall.
| SLIDING WINDOW TYPE | AVG WIDTH | AVG HEIGHT |
|---|---|---|
|
2-Slider Windows |
36 to 48 inches (3 to 4 feet) |
24 to 36 inches (2 to 3 feet) |
|
3-Slider Windows |
54 to 72 inches (4 feet 6 inches to 6 feet) |
36 to 60 inches (3 to 5 feet) |
|
4-Slider Windows |
72 to 96 inches (6 to 9 feet) |
36 to 60 inches (3 to 5 feet) |
Awning Windows
This style of window has a single moveable sash that is hinged on top and opens outward. The opened sash creates an awning above the window opening to protect your home’s interior from light rain while still providing ample ventilation. These are the most common type of windows used in basements.
| AWNING WINDOW TYPE | AVG WIDTH | AVG HEIGHT |
|---|---|---|
|
Standard Awning Window |
12 to 48 inches (1 to 4 feet) |
12 to 24 inches (1 to 2 feet) |
|
Awning Transom Window |
12 to 48 inches (1 to 4 feet) |
12 to 48 inches (1 to 4 feet) |
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