Measuring Guides

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Printable Measuring Guides and Worksheet

We recommend you download and print our measuring guides and worksheet. Our measuring worksheet will help you attain the correct measurements for your windows. Please note that you are responsible for your measurements. If you have any measuring questions please give our customer service team a call and we will be happy to assist you.

Read our Online Measuring Guides

Next review our detailed measuring guide. In our measuring guide you will find instructions on how to measure most typical windows for both inside and outside mount. For tricky windows and uncommon applications please review our specialty guide.



1) Measure the width inside the window opening at the top, middle and bottom. Take the narrowest of the three width measurements, and round down to the nearest 1/8".

2) Measure the height inside the window opening from the top of the window opening to the window sill three times. Measure once on the left, at the center, and on the right and take the longest of the three measurements. If you prefer to keep the blind from resting on the sill deduct a 1/4" from the height. If your window does not have a sill, measure to the point you would like the blind to reach.

3) Measure the window on the diagonal. If the two diagonal dimensions differ significantly, it may be necessary to order an outside mount for optimal light control and privacy. See measuring instructions below.

4) Do not take any allowances on the height or width. The factory will take all required allowances on an inside mount for mounting and operating clearance.




1) Measure the width inside the window opening at the top, and round down to the nearest 1/8" measurement.

2) Measure the height inside the window opening from the top of the window opening to the window sill three times. Measure once on the left, at the center, and on the right and take the shortest of the three measurements , and round down to the nearest 1/8" measurement.

3) Do not take any allowances on the height or width. The factory will take all required allowances on an inside mount for mounting and operating clearance.




1) Measure the distance from the outermost points you would like the blind to cover. To minimize light leakage the blind should overlap the window opening by at least 1 1/2" on each side for a total of 3" on entire width.

2) Measure distance from where the top of the blind will be located to the window sill. The blind should overlap the window opening on the top by at least 1-1/2". Some products may require more then 1-1/2" above the window for mounting hardware. Please review product specifications on desired product for exact flat vertical surface area requirements. If flat vertical surface area exceeds 1-1/2" use specified amount to determine overlap above the window opening. If there is no window sill, measure to the point you would like the blind to reach.




1) Measure the distance from the outermost points you would like the blind to cover. To minimize light leakage and ensure privacy the blind should overlap the window opening by 4" on each side for a total of 8" on entire width.

2) Measure distance from where the top of the blind will be located to the window sill. The blind should overlap the window opening on the top and the bottom by at least 3".

3) If the blind will hang to the floor, take a 1/2" deduction on the height to allow for operating clearance.