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How to Measure for an Inside Mount Perfect Arch Top

Measuring for Perfect Arch Top Blinds and Shades is very easy. Make sure you use a steel tape measure for all measurements.

Measure the width of the window opening at the bottom part of the window to the nearest 1/8th of an inch. This is the only measurement you need to make since the height is 1/2 of this width on a Perfect Arch Top.

Note: The width is shown in the diagram to the right.