How to Measure Window for Custom Blinds
Accurate measurements of your window’s width and height are essential for perfectly fitting custom window blinds. Follow these simple steps to measure your windows accurately for either inside or outside mount blinds.
Step 1: Gather Your Tools
Before you begin measuring window for your custom window blinds, make sure you have:
1. A steel measuring tape.
2. A pencil and notepad to record measurements.
3. A step stool or ladder if you’re working with tall windows.
Step 2: Decide on the Mount Style
Your choice of mount style will determine how you measure:
Inside Mount: Blinds fit neatly inside the window frame.
Outside Mount: Blinds are installed outside the frame, covering a larger area.

Measuring for Inside Mount Blinds
For inside-mount blinds, precise measurements are key to ensuring a snug fit within the frame.
Measure Window Width: Write down the narrowest measurement to ensure your blinds will fit properly inside the frame.
Measure Window Height: Record the longest measurement to ensure full coverage for your custom window blinds.
Measuring for Outside Mount Blinds
Outside mount, blinds are made to cover the whole area of the window and provide improved control of light.
Measure Width: Take the overall width you would like the blinds to cover, with additional space on either side (add 2–3 inches on each side for optimum coverage).
Measure Height: Measure from the top of where the blinds will be mounted (usually above the window frame) to the bottom of the area you want to cover.
Additional Tips for Accurate Measurements
- Always round your measurements to the nearest 1/8 inch for precision.
- Measure each window individually, even if they look identical.
- For windows with molding or trim, include them in your outside mount measurements.
- Clearly label your measurements, such as “Living Room Left Window” or “Bedroom Window 1.”
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Now Ready to Order Your Blinds
Once you’ve recorded your custom window blinds measurements, be sure to indicate whether your measurements are for inside or outside mount blinds when placing your order. Our team at Parker Window Blinds will adjust the sizes slightly to ensure a perfect fit for your custom window blinds.
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