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How to Measure Windows Correctly Before Buying Roller Blinds?

Roller blinds have become a popular type of window covering that maintains privacy and blocks light.

2026-08-25

Roller blinds have become a popular type of window covering that maintains privacy and blocks light. Most people think that it is easy to choose roller blinds for their windows. However, they ultimately find their blinds do not fit the windows. Too narrow/wide designs and the wrong height are the most common issues affecting the functionality and appearance of blinds. It happens especially if you have not measured your windows before buying the accessories.

So, let us guide how to measure windows appropriately to purchase blinds online.

Should the blinds sit inside or outside the window frame?

Before using a tape for window measurement, you have to choose between the recess fit and face fit.

Recess fit involves installing the blinds inside the frame to create a minimal look. The roller blind, neatly tucked into the frame, shows off the shape of your windows. This option is best for those who have striking tiles or window frames. Make sure there is a slight gap at the blind’s edge.

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On the contrary, face fit involves installing the blinds outside the frame. The blind, sitting on the wall, will cover the window fully. Allow extra height and width while measuring windows.

Measuring dimensions of different types of windows-

Not every home has the same type of window. Depending on the window style, you have to determine the measurement process.

Standard windows- Only a few basic steps will help you measure the standard window. Many older sash and modern uPVC windows have a simple design, which is easy to measure. Each section needs to be measured individually. You have to measure angles between sections.

Patio doors- If you have patio doors, measure their full width. From the door handle clearance to the door opening direction, every detail needs your attention.

Roof windows and skylights- You may check the manufacturer’s measurements while buying blinds for roof windows. Note if there are handles or ventilation flaps. Motorised systems are the best choice for hard-to-reach locations.

Shaped windows- Circular, arched, or triangular windows need accurate measurement. It is better to depend on professionals for measuring these windows.

Tips for measuring windows for indoor roller shades-

Find a simple guide to measuring your windows for roller blind installation.

  • Determine the width and height of the window-

Measure the width of your window frame or glass to cover it fully. Then, add the fabric’s margin, extending beyond the window on each side. The standard margin for each side is 5 cm.

Choose the point where you like to install the bracket. Take the measurement from that point to where the fabric would reach.

  • Check the chosen installation surface-

Ensure there is some frame space or clear wall above the window for the blind and bracket. Moreover, you should check for wall lights, curtain rails, shelves, and air vents.

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Measure twice before buying the blinds-

You should measure the window twice before purchasing the window blinds. After taking measurements, you have to repeat the process. Make sure that the width and drop measurements are accurate. Every window needs proper labelling to avoid mistakes.

Understand the size of the blind and the fabric-

The fabric width and the blind size often create confusion for buyers. Depending on the manufacturer and the design, the blind width includes the brackets. But, the fabric’s width is slightly narrower.

Place your order for roller blinds-

Are you looking for the best roller blinds manufacturer? Consol Blinds and Home is a reliable destination where you can buy high-quality blinds. We also sell top-tier fabrics and blind accessories for different types of windows.