How to Measure

Window Measurement for Blinds, Shades, & Shutters

  • Inside Mount is more common; the blinds sit inside the window frame.
  • Outside Mount spans beyond the window casing.
  • Every window opening is unique so be sure to measure each individual window
  • Use a metal tape measure of more accurate measurements
  • Measure the width and height to the nearest 1/8”
  • Never assume a window is perfectly square

Inside MountFor Inside Mount:

  1. Measure the window width in 3 places. Use the SMALLEST of the 3 measurements. The top measurement is crucial because the head rail must fit.
  2. Measure the window height in 3 places. Use the LONGEST of the 3 measurements.
  3. Do not make any deductions. The fabricator will make proper allowances to ensure a perfect fit.


Outside MountFor Outside Mount:

  1. Measure the exact width to be covered. Make sure the measurement overlaps the window opening by at least 2” on each side including the bottom. This will eliminate gaps.
  2. Measure the exact height to be covered. Typically, the desired overlap is from the top edge of the molding to the bottom edge.
  3. Outside mounts will be produced to the exact size ordered.

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