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When choosing windows for your home, one of the very first things to consider is the window frame dimensions. It is because, if you pick the wrong size, you could end up with poor ventilation, bad lighting, or even structural issues.
But don’t worry. We will simplify and walk you through standard window sizes, custom window sizes, window dimensions in feet, and the best fit for every room in your house, in a way that’s easy to understand.
Different Types of Windows And Their Dimensions
Not all windows open the same way. The style you choose will affect the window frame dimensions available.
1. Single & Double-Hung Windows
These are the most common windows in homes. Single-hung windows open from the bottom, and the double-hung windows let you open both the top and bottom sections. They are the types of sash windows.
Ideal sizes are,
- 2 x 3 feet
- 3 x 4 feet
- 3 x 5 feet
Single & Double-hung windows are best for bedrooms, living rooms, and kitchens.
2. Casement Windows
These windows are hinged on the side and open like a door, outwards. They provide great airflow.
Ideal sizes are,
- 2 x 3 feet
- 2.5 x 4 feet
- 3 x 5 feet
Casement windows are best for bedrooms and kitchens.
3. Awning Windows
These windows are hinged at the top and open outward.
Ideal sizes are,
- 2 x 2 feet
- 2.5 x 3 feet
Awning windows are suitable for bathrooms and kitchens.
4. Sliding Windows
These windows slide horizontally and are perfect if you want to open your window wide.
Ideal sizes are,
- 3 x 3 feet
- 3 x 4 feet
- 4 x 5 feet
Sliding windows are best for living rooms and bedrooms.
Also read: 8 latest window designs for houses in 2025
5. Tilt & Turn Windows
Source: Wikimedia commons
These windows tilt inwards from the top for ventilation and also swing fully open like a casement window, outward, when turned.
Ideal sizes are,
- 2 x 3 feet
- 3 x 4 feet
Tilt & Turn windows are best for modern homes and offices.
6. French Windows
These are floor-to-ceiling windows and are typically large. They have two big glass panels that open from the middle, like a door. They are bigger than casement windows, which have only one panel.
Ideal sizes are,
- 4 x 6 feet
- 5 x 7 feet
- 6 x 8 feet
French windows are best for balconies and gardens.
7. Picture or Fixed Windows
These windows are large, don’t open and are designed purely for an unobstructed view.
Ideal sizes are,
- 4 x 3 feet
- 5 x 4 feet
- 6 x 5 feet
Picture windows also known as fixed windows are best for cosy reading corners and living rooms.
8. Bay Windows
These are a combination of multiple windows, often fixed and operable ones, extending outwards, adding space and light to a room. It is best to keep it separate.
There are no standard sizes, as these windows can only be customised.
Bay windows are best for living rooms and reading corners.
9. Speciality Windows
Speciality windows refer to custom-shaped or uniquely designed windows, like arched, circular, triangle, or stained glass windows.
There are no standard sizes, as these windows can only be customised.
Also read: How to maximise natural light with uPVC window designs?
Understanding Window Standard Sizes
Most windows come in predefined sizes, often referred to as standard window measurements. These sizes are commonly used in homes and buildings because they fit standard construction requirements, making installation easier and more cost-effective.
Manufacturers mass-produce them to save you time and money.
Window Sizes Standard For Different Rooms
Window Size For Bedroom
Window size bedroom should be well-ventilated. The standard window size in feet for a bedroom depends on the room’s layout. Typically, 3 x 4 feet or 3 x 5 feet works well.
If you want a larger window, go for a 4 x 5 feet casement or sliding window. It makes your room feel spacious and fresh.
Living Room
The windows in the living room should be open and bright, allowing the sunlight to soak in. Bigger windows of sizes 4 x 5 feet, 5 x 6 feet, or even larger picture windows work best.
If you have the space, you can also go for bay windows, which extend outwards, adding extra charm and natural light.
Kitchen
The windows in the kitchen are often placed above sinks or counters. So, they cannot be too large. The standard size of windows in feet for a kitchen is 2 x 3 feet or 3 x 3 feet.
These sizes provide ventilation without taking up too much space.
Bathroom
Bathrooms need privacy, while still allowing proper ventilation. The standard size of window in feet for bathrooms is 2 x 2 feet or 2.5 x 3 feet.
You can also opt for frosted or tinted glass for more privacy and better lighting.
Also read: How do well-ventilated windows improve air quality at home?
Custom Window Sizes: Do You Need Them?
In some houses, the standard window sizes in feet won’t work because of the unique architectural design. Then, custom-sized windows are recommended. But keep in mind that they can be more expensive than standard sizes.
If you are building a new home or remodelling, it is a great option- to create something new for yourself. But for simple replacements, it is better to stick with std window size options, as they can save you a lot of money.
How To Choose the Right Window Dimensions For Your Home?
We can understand if you feel overwhelmed by all the options. It’s okay. To choose the right window frame dimensions for your home, consider
- Proper ventilation
- Natural light
- If the windows match your home’s style
- Insulation and energy efficiency
Final Takeaway
Choosing the perfect window frame dimensions is crucial for both function and aesthetic purposes. Whether you stick with window size standard or opt for custom window sizes, it is important to pick the right fit for your space.
Still have questions? Contact the GreenFortune team for more details.
Also read: How to choose the best energy-efficient windows for your home?
At GreenFortune, we provide high-quality uPVC windows that are highly durable, energy-efficient, weather-resistant, and need low maintenance. They are far better than traditional wood or aluminium products, making them the best choice for your home or office.
Whether you need standard sizes for a quick renovation or custom-made windows for a unique look, we have got you covered.
Explore our products!
FAQs
1). What is the size of a standard window frame?
The window frame sizes depends on the type of window and the room you need it to be installed. The standard window dimensions are 3 x 4 feet, 3 x 5 feet, or 4 x 5 feet.
2). How to calculate window frame size?
Take a measuring tape and check the width (side to side) and height (top to bottom) of the space where the window will go. The window frame dimensions should be slightly smaller than this space so it fits properly. Usually, leaving a small gap (about half an inch) helps with easy installation.
3). What size window for a 10 x 10 room?
For a 10 x 10 feet room, The standard window length cab be 3 x 4 feet or 3 x 5 feet window. If you want more light, a 4 x 5 feet sliding or casement window is a great choice.
