Measuring

For Inside Mount blinds (Don’t forget to check your depth)

  • Width: Measure exact distance to the nearest 1/8″ between inside surfaces of window frame at the top, middle, and bottom, and use the narrowest width. Do not make any deductions, the factory will automatically make appropriate deductions to fit inside the space
  • Height: Measure exact distance to the nearest 1/8″ from inside surface at top of window to sill at the left & right and use the longest height..

For outside Mount blinds:

  • Width: Measure exact distance to the nearest 1/8″ between the outermost points where the blind is to be placed. For optimal light control, this measurement should extend 3/4″ beyond the window opening on each side (or 1 1/2″ for the entire width).
  • Height: Measure exact distance to the nearest 1/8″ from where top of the blind will be located to the top of sill. If there is no sill or if blind is to overlap window frame, measure to the point the shade reaches.

Allow some overlap

For outside mount applications allow the blind to overlap 1 1/2″ to 3″ on either side & top and bottom of the window.

You must add the overlap to your measurement since manufacturers do not.

Remember Windows Are Rarely Perfectly Square!