How to Measure Window Shades Correctly (Step-by-Step Guide)
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Accurate measurement is essential for custom window shades to ensure a perfect fit.
Step 1: Choose Mount Type
- Inside Mount (inside window frame)
- Outside Mount (outside frame)
Step 2: Inside Mount Measurement
Width
Measure top, middle, and bottom. Use the smallest value.
Height
Measure left, center, and right. Use the largest value.
Tip: Do not deduct unless instructed.
Step 3: Outside Mount Measurement
Width
Add 10–15 cm (4–6 inches) beyond window width for better coverage.
Height
Extend 10–20 cm above the window for better blackout performance.
Common Mistakes
- Only measuring once
- Mixing cm and inches
- Ignoring window handles or trim
Pro Tip
For maximum blackout performance, outside mount is recommended.
Need help? Contact us for custom size support.