Window Measuring Guide
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Custom Window Blinds Measurement Guide for Roller, Roman, Zebra & Honeycomb Shades
Getting the right measurements is the most important step when ordering custom window blinds. A precise measurement ensures a perfect fit, smooth installation, and a clean, built-in look for your home.
Whether you're installing roller shades, Roman shades, zebra blinds, or honeycomb blinds, this guide will walk you through everything step by step.
Why Accurate Measurement Matters
- Prevents light gaps and privacy issues
- Ensures perfect inside or outside mount fit
- Improves insulation and energy efficiency
- Helps avoid installation problems
Custom blinds are made-to-measure, so even 1/4 inch matters.
What You Need
- Steel tape measure (not fabric tape)
- Pen and paper or phone notes
- Step stool for tall windows
Step 1: Choose Your Mount Type
Inside Mount (Recommended)
Blinds are installed inside the window frame for a clean built-in look.
- Modern appearance
- Best for Roman, Zebra, Roller shades
- Requires precise measurements
Outside Mount
Blinds are installed outside the window frame, covering the trim.
- Better light blocking
- Ideal for shallow frames
- More forgiving measurement
Step 2: How to Measure Width
Inside Mount Width
Measure the inside width at three points: top, middle, and bottom.
Use the smallest measurement.
Outside Mount Width
Measure the area you want to cover and add 2–4 inches on each side for better light blocking.
Step 3: How to Measure Height
Inside Mount Height
Measure left, middle, and right sides.
Use the longest measurement.
Outside Mount Height
Measure from the top of desired installation point to where you want the blind to end.
Step 4: Special Window Types
French Doors
Measure only the glass panel and ensure clearance for handles.
Recommended: Custom Roman Shades
Bay Windows
Measure each window section separately. Do not combine widths.
Shallow or Deep Frames
Deep frames are suitable for inside mount. Shallow frames may require outside mount.
Step 5: Choosing the Right Blind Type
Roller Shades
Minimal, modern design for clean interiors.
Shop Roller Shades
Roman Shades
Elegant fabric folds for a decorative look.
Shop Roman Shades
Zebra Blinds
Adjustable light filtering and privacy control.
Shop Zebra Blinds
Honeycomb Shades
Best insulation and energy efficiency.
Shop Honeycomb Shades
Common Mistakes to Avoid
- Only measuring once
- Using fabric tape instead of steel tape
- Rounding measurements too early
- Ignoring window handles or obstructions
- Confusing inside and outside mount
Pro Tips for Perfect Fit
- Always measure twice
- Write down exact numbers
- Take photos of your window
- Check for obstructions
- Choose outside mount if unsure
Recommended Room Usage
- Bedroom – blackout or honeycomb shades
- Living room – zebra or Roman shades
- Kitchen – light filtering roller shades
- Bathroom – moisture resistant blinds
- Office – glare control zebra blinds
Ready to Order Custom Blinds?
Explore our full collection of custom window treatments:
Frequently Asked Questions
Do I need to deduct size for inside mount blinds?
No, just provide exact measurements and we will handle manufacturing adjustments if needed.
What if my measurements are slightly different?
Always provide the smallest width and largest height for inside mount.
Can I install blinds myself?
Yes, all our blinds are designed for easy DIY installation.
What if I measure incorrectly?
Contact us before production starts so we can help adjust your order.
Final Advice
Accurate measurement ensures a perfect fit and smooth installation. Take your time and follow each step carefully.