Measurement Guide for Windows

Custom made blinds by North Shore Shutters and blinds are manufactured to the measurements you provide. Have on hand a steel measuring tape, paper and pencil, and a step ladder for high measurements. Please follow these guidelines carefully. Some windows may appear to be the same size, however you should measure each window individually to avoid mistakes.

  • Decide if your blinds will be inside or outside the window frame.
  • Always use a steel tape measure for accuracy. DO NOT use a cloth tape.
  • Measure and round off to the nearest mm. Check in several places in case the window is not perfectly square.
  • If deductions are necessary, the factory will make the allowances. Do not make these yourself.
  • First, measure WIDTH, write it down. Clearly indicate this measurement is the width.
  • Second, measure DROP, write it down. Clearly indicate this measurement is the length.
  • Always indicate the WIDTH measurement first, then the HEIGHT last. (e.g.. 2150w x 1530d or 2150 x 1530)
  • When measuring for an inside mount – Please provide the ACTUAL WINDOW OPENING SIZE to us, our factory will take all the proper allowances for it to fit into that opening.
  • Check the position of handles, bars or tiles and the depth of a window can affect the fit of a blind. Take these into account when determining the fit.

Please double check ALL measurements. 


Inside Mount (recessed) 
For inside mount your blind will fit inside the recess. Whenever possible, we recommend an inside mount for a more finished appearance. If you have decided on an inside mount, we will need you to provide us with the window opening measurements. A deduction will be made to ensure proper operation and provide enough allowance for the blinds not to rub against the frame.

  • WIDTH: Measure the EXACT width of the window in three places. Use the narrowest width measurement.
  • DROP: Measure the EXACT DROP of the window in three places. Use the shortest height measurement.

Window Depth: The space from the windows outer edge to the back of the window (or obstructions such as handles).

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