3 Minutes of your time
Tape Measure
Pen and paper to record your measurements
What you will need

Step 1: Measuring Your Window’s Recess Depth
Before you measure the width and height of your window, it’s important to check the recess depth to ensure there’s enough space for the Guard to fit inside.
- Minimum recess depth required: 3 centimeters for proper installation.
- How to measure: Start at the front edge of the window recess (the part farthest from the window) and measure to the shallowest point within the recess.

Step 2: Measuring the Width
Since windows are often not perfectly square, you need to measure the width in three different places to account for any unevenness:
- Top of the window recess
- Middle of the window recess
- Bottom of the window recess
Record the smallest of these three measurements. This ensures your Guard fits the narrowest point of your window.

Step 3: Measuring the Height
Next, measure the height of your window recess. Once again take measurements from three locations:
- Left of the window recess
- Middle of the window recess
- Right of the window recess
Just like with the width, record the smallest of these three measurements.
Final Tips for Accurate Measurement
- Be precise: Use exact measurements, if needed round to the nearest sixteenth of an inch (tenth of a centimeter). This ensures the best fit.
- Allow us to make the deductions: Provide the exact width and height, and we’ll make any necessary adjustments during manufacturing.
- Measure at the front of the recess: This is the area where the Guard will be installed, so it’s crucial to measure accurately at this depth.
What If I Make a Mistake?
If you think you’ve made an error while measuring, contact us immediately at support@blockblinds.shop, and we’ll work with you to correct the measurements before your Guard goes into production.
Questions & Answers
What makes Guard different from other blackout blinds?
What makes Guard different from other blackout blinds?
Guard features a unique track system that eliminates gaps between the blinds and the window frame to ensure total darkness. The dual-layered honeycomb fabric combines non-woven polyester with a reflective thermal barrier to block light, insulate against heat, and reduce noise.
Is Guard suitable for all window types?
Is Guard suitable for all window types?
Guard is designed to fit most standard window types, but there are a few considerations.
Guard won't fit windows that are not square. Additionally, the blinds require at least 3 centimeters of unobstructed recess space for proper installation. If your window doesn't meet these criteria, Guard may not be suitable for you.
Here's a list of compatible and incompatible window types to help you determine if our product is the right fit for your home:
✔️ European Windows
✔️ Tilt-and-Turn Windows
✔️ Fixed Windows
✔️ Sliding Windows
✔️ Casement Windows
✔️ Hung Windows
✔️ Sash Windows
✔️ Bay Windows
✔️ Awning Windows
✔️ Skylights
How do I measure my windows for Guard?
How do I measure my windows for Guard?
To ensure correct measurements, please read our Measuring Guide. It's important that your measurements are accurate and precise, as they are crucial for the blinds to fit properly. Incorrect measurements will result in the blinds not fitting your windows.
Does Guard require any special maintenance?
Does Guard require any special maintenance?
Guard is low-maintenance. The non-woven polyester fabric resists dust and stains, requiring only occasional cleaning with a damp cloth. No special cleaners or treatments are necessary.
How do I install Guard?
How do I install Guard?
To install Guard, follow our step-by-step instructions in our Installation Guide.
Ready to Order?
With your measurements complete, you're now ready to order Guard with a perfect fit and total blackout.