4 Examples to Help You Determine the Right Curtain Size!

How to Choose the Right Curtain Size for Your Windows?

When selecting roller blind products, you will find that most stores ask you to provide the actual width and height dimensions you need. Some customers may be deterred from purchasing because they find measuring dimensions complicated and difficult, thus missing out on the opportunity to enhance their windows with affordable and beautiful new treatments.

We don't want you to miss out on enhancing your windows with beautiful new treatments due to measurement concerns. Here are the secrets to measuring for roller blinds accurately. Before you start, gather the following tools: a metal tape measure, paper, pencil, and a ladder. Pay attention to these important tips:

1. Use a Metal Tape Measure: Always use a metal tape measure, as a cloth tape measure can lead to errors.
2. Decide on Installation Type: Determine if your roller blinds will be installed inside the frame or outside the frame. The measurement methods differ for each type.
3. Curtain Coverage Width: The width you measure should be the width of the curtain coverage, not the window width.
4. Record Measurements Correctly: Note down measurements in the order of width x height to avoid any confusion later.
5. Round Up Measurements: Curtains should be measured to the nearest 0.5 cm. Round up as necessary.
6. Measure Multiple Points: Windows are rarely perfectly square. Measure at multiple points for both width and height to avoid discrepancies.

By following these steps, you'll ensure your roller blinds fit perfectly and look stunning in your space.

You can make preliminary measurements at home first, or you can take photos and consult with us, and we will provide you with appropriate planning suggestions. Before you start taking measurements, decide how you want your curtains to be installed based on your personal preference and your window type. We’ve categorized different curtain installation methods and included instructions below so you’ll have a better idea of how to measure the appropriate dimensions for the style of curtains you’re after. 

- Half-height Window

  - Window Frame

  - Curtain Box

  - No Obstruction Above

  - Obstruction Above 

- Floor-to-ceiling Window

  - Window Frame

  - Curtain Box

  - No Obstruction Above

  - Obstruction Above 

- Installation Position

  - Inside Frame

  - Outside Frame 

Reminder:

- The dimensions mentioned here do not refer to the width of the window, but the width of the curtain coverage.

- When measuring, please use a metal tape measure. Using a cloth tape measure may cause measurement errors.

- The minimum size unit for each curtain is 0.5 cm. 

Roller Blind Size Measurement

First, let’s introduce the method of measuring within the frame:

In-Frame Measurement** refers to installing the roller blind on the inside of the window frame. This method provides a simple and neat appearance, making it suitable for environments with narrow spaces and reducing the extra area occupied by the thickness of the blinds. 

Measurement Method:

1. Width: Measure the inner width of the window frame. Please measure the upper, middle and lower positions. Choose the narrowest number and deduct 1 cm as the reserved space in advance.
2. Height: Measure the inner height of the window frame. Please measure the left, middle and right positions and choose the largest number.
3. Depth: Measure from the outer edge of the window frame to the deepest part of the window. If there are obstacles, such as window handles, please measure from the outer edge to the position of the obstacle. 

Next, let’s explain the method of measuring outside the frame: Measuring Outside the Frame

By analogy with the above, it means installing roller blinds on the outside of the window frame, which can be used to cover unsightly windows and also meet the needs for better light shading and privacy.

1. Width: Measure the complete width of the window frame, plus the width you want to extend the coverage. It is generally recommended to extend the left and right sides by 10 cm.
2. Height: Measure the full height of the window frame, plus the height you want to extend to cover. 

S-Shaped Wave Curtain and Snake Curtain Size Measurement

[Half-Waist Window]

Window Frame - Installed Inside the Frame

Generally suitable for bay windows with sills, fine trim, or deep bay windows. In this case, in-frame installation can better highlight the overall aesthetics. 

Measurement Method:

1. Width: Measure the width of the frame to reserve the size of the curtain rod to be installed.
2. Height (Track + Curtain Cloth): To avoid that the window frame is not completely horizontal, please divide the window into three equal parts (left, middle, right) for measurement, and select the maximum value as the height standard. It is generally recommended that the total height here Remove another 1 cm to avoid directly dragging the countertop or blocking the trim.
3. The window frame is 7 cm deep and can be fully embedded in the wall. 

Window Frame—Installation Outside the Frame

The most commonly used installation form can completely cover the window and reduce the chance of light penetrating into the room from the outside. 

Measurement Method:

1. Width: Depending on the length of the curtain rod you want to install, the width of the fabric should be the same. It is generally recommended to add 15 centimeters from both ends of the window edge as the total length, which can better achieve the light-shielding effect and visual beauty.
2. Height: Measure the height from the track to the outside of the lower edge of the frame, plus the height of the position where you want the curtain to cover additionally. If space conditions permit, it is generally recommended to increase the lower edge of the window frame by 15 to 30 centimeters. 

Curtain Box

There is a specially made curtain box above the window.

Measurement Method: In this case, both width and height need to be measured from inside the curtain box. 

Floor-to-ceiling windows

Accessible from Above

Generally suitable for indoor spaces with relatively high height. 

Measurement Method:

1. Width: Depending on the length of the curtain rod you want to install, the width of the fabric should be the same. It is generally recommended to add 15 centimeters from both ends of the window edge as the total length, which can better achieve the light-shielding effect and visual beauty.
2. Height: About 9 cm above the window edge. If space conditions permit, it is generally recommended to be about 1 cm above the ground. 

There is an obstacle above

Used in spaces where the indoor height is limited by beams, columns, or ceilings. 

Measurement Method:

1. Width: Depending on the length of the curtain rod you want to install, the width of the fabric should be the same. It is generally recommended to add 15 centimeters from both ends of the window edge as the total length, which can better achieve the light-shielding effect and visual beauty.
2. Height: Measure from the top of the ceiling or beams. If space conditions permit, it is generally recommended to be about 1 cm above the ground. 

Curtain Box

There is a specially made curtain box above the window.

Measurement Method: In this case, both width and height need to be measured from the inside of the curtain box. Considering space conditions, it is generally recommended that the height be about 1 cm above the ground."

▶ Exploring the Advantages and Disadvantages of Snake Curtains: Differentiating Between Snake Curtains and Pleated Curtains in Seconds 

Zebra Blind Size Measurement

[Half-Waist Window]

Window Frame - Installed Inside the Frame

Generally suitable for bay windows with sills, fine trim, or deep bay windows. In this case, installation inside the frame can be simpler and neater. 

Measurement Method:

1. Width: Please measure the window into three equal parts (top, middle, and bottom) and select the minimum value as the width standard. It is generally recommended to subtract 1 cm from the total width here to prevent the zebra curtain from being embedded in the wall.
2. Height: To prevent the window frame from being completely horizontal, divide the window into three equal parts (left, middle, and right) for measurement, and select the maximum value as the height standard. It is generally recommended to subtract 1 cm from the total height here to avoid mopping the countertop or blocking the trim directly.
3. The window frame is 7 cm deep and can be fully embedded in the wall."

Window Frame—Installation Outside the Frame

This commonly used installation method can completely cover the window, reducing the chance of light penetrating into the room from the outside. 

Measurement Method: It is generally recommended to add 10 centimeters to the width and height beyond the window edge as the total dimensions. This approach enhances the light-blocking effect and visual appeal, but adjustments may be needed based on personal space conditions. 

Curtain Box

There is a specially made curtain box above the window. 

Measurement Method:

1. Width: Measure from the inside of the curtain box. It is recommended to subtract 1 cm from the width to avoid errors.
2. Height: Measure from the inside of the curtain box. You can add an additional 10 centimeters below the window edge for the total length, but this may vary depending on personal space conditions.

Floor-to-ceiling windows

Accessible from above, French windows are generally suitable for indoor spaces with relatively high ceilings. 

Measurement Method:

1. Width: The width of the fabric should match the length of the curtain rod you plan to install. It is generally recommended to add 10 centimeters on both sides of the window edge for a better light-shielding effect and visual appeal.
2. Height: Measure about 9 centimeters above the window edge. If space conditions permit, the curtain length should ideally end about 1 centimeter above the ground. 

Obstacle Above

Used in spaces where the indoor height is limited by beams, columns, or ceilings. 

Measurement Method:

1. Width: The width of the fabric should match the length of the curtain rod you plan to install. It is generally recommended to add 10 centimeters on both sides of the window edge for a better light-shielding effect and visual appeal.
2. Height: Measure from the top of the ceiling or beams. If space conditions permit, the curtain length should ideally end about 1 centimeter above the ground. 

Curtain Box

There is a specially made curtain box above the window. 

Measurement Method:

1. Width: Measure from the inside of the curtain box. It is recommended to subtract 1 cm from the width to allow for a proper fit.
2. Height: Measure from the inside of the curtain box. If space conditions permit, the curtain length should ideally end about 1 cm above the ground.

▶Extended Reading: Are Dimming Roller Blinds (Zebra Blinds) Recommended? Advantages, Disadvantages, Style, and Price Guide

Roman Blind Size Measurement 

Window Frame - Installed Inside the Frame

This installation method is generally suitable for bay windows with sills, fine trim, or deep bay windows. Installing inside the frame provides a simple and neat appearance. 

Measurement Method:

1. Width: Divide the window into three equal parts (top, middle, and bottom) for measurement, and select the minimum value as the width standard. It is generally recommended to subtract 1 cm from this total width to ensure the Roman blinds can be successfully embedded in the wall.
2. Height: To account for any horizontal misalignment in the window frame, divide the window into three equal parts (left, middle, and right) for measurement, and select the maximum value as the height standard. It is generally recommended to subtract 1 cm from this total height to prevent the blinds from touching the countertop or blocking the trim.
3. Depth: Ensure the window frame is at least 7 cm deep to allow the blinds to be fully embedded in the wall. 

Window Frame—Installation Outside the Frame

This commonly used installation method can completely cover the window, reducing the chance of light penetrating into the room from the outside. 

Measurement Method: It is generally recommended to add 15 centimeters to both the width and height beyond the window edge for the total dimensions. This approach enhances the light-blocking effect and visual appeal, but adjustments may be necessary based on personal space conditions. 

Curtain Box

There is a specially made curtain box above the window. 

Measurement Method:

1. Width: Measure from the inside of the curtain box. It is recommended to subtract 1 cm from the width to avoid errors.
2. Height: Measure from the inside of the curtain box. You can add an additional 15 cm below the window edge for the total length, but this may vary depending on personal space conditions.

Recommended customization curtains and blinds: ElementiCurtains 

If you encounter any questions while taking preliminary measurements at home, feel free to take photos and consult with us. We'll provide you with appropriate planning suggestions. Now that the hassle of measuring curtains and roller blinds no longer troubles you, why not invest in curtains and roller blinds that best complement your home's window decorations? 

With the myriad types of curtains available, it's understandable if you feel overwhelmed by the choices. To assist you in your selection, we've compiled a list of Recommended Styles and Types of Curtains and Roller Blinds for Homes with High CP Value: Super Detailed Advantages and Disadvantages/Price Comparison, to help you find the curtains that perfectly match your needs. 

Are you intrigued by dimmable roller blinds that offer adjustable light transmission and shading? We recommend your secret weapon for indoor dimming: dimmable roller blinds. Additionally, if you've ever faced the challenge of installing a roller blind at home without knowing where to start, we welcome you to refer to our roller blind installation tutorial.