How to Measure Your Window Before Ordering Curtains

The most common problem customers face is an inaccurate measurement: a curtain that arrives smaller or larger than the window. The good news is that measuring is straightforward when you follow the right steps.

What you need

• A metal tape measure, which is more accurate than a fabric tape
• Paper and a pen
• A small stepladder if the window is high

First: choose the mounting position

Inside mount: the curtain sits inside the window recess. It looks clean and refined, but the recess must be deep enough.

Outside mount: the curtain is fixed to the wall around the window. It blocks light more effectively and can make the window appear larger.

Second: take the measurements

For an inside mount:

• Measure the width in three places: top, middle, and bottom.
• Use the smallest measurement.
• Measure the height in three places: right, centre, and left.
• Use the largest measurement.

For an outside mount:

• Measure the window width, then add 5–10 cm on each side for better light coverage.
• Measure from the point where the bracket will be fixed to the bottom of the window, adding the drop you prefer.

Common mistakes to avoid

• Relying on one measurement; walls and frames are not always perfectly square.
• Overlooking handles or obstructions around the frame.
• Forgetting to check recess depth for an inside mount.
• Rounding casually instead of writing the exact millimetre or centimetre measurement.

One final tip

Label every measurement with the room name and take a photo of the window. If you are still unsure, our team can help or visit the site before anything is made.