How To Measure

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Download a Measure Worksheet

Measuring – Inside Mount

  • Use a steel measuring tape.
  • Measure to the nearest eighth of an inch – don’t round your measurements.
  • On your notes, clearly indicate which measurement is the width and which is the height. It is very common to transpose measurements. Always indicate the WIDTH measurement first, then the HEIGHT last. (W x H)
  • Remember one very important thing when measuring for an inside mount – Take the ACTUAL WINDOW OPENING SIZE to give to us, our factory will take all the proper allowances for it to fit into that opening.

For an inside mount:

Measure the opening width at the top, center and bottom, recording the narrowest width. Always measure to the nearest 1/8″, and be sure to use a steel tape measure. See tip below.

Measure the height left, right and center, recording the tallest height.

When you specify inside mount, the factory will make your blind slightly narrower than you specified to allow for operating clearance. They will deduct between 1/16″ and 3/8″ from the width on each side. The deductions are made so that the blind will not rub or scratch your window frame. So do not take the deduction yourself. Provide the exact window opening width.

For a flush inside mount (the blind completely recessed so that the top of the blind does not project out of the opening) check that you have enough depth.

Measuring – Outside Mount

  • Use a steel measuring tape.
  • Measure to the nearest eighth of an inch – don’t round your measurements.
  • On your notes, clearly indicate which measurement is the width and which is the height. It is very common to transpose measurements. Always indicate the WIDTH measurement first, then the HEIGHT last. (W x H)
  • Remember one very important thing when measuring for an outside mount – Add at least 3″ to each side of the window opening for minimum light gap coverage and maximum privacy.

For an outside mount:

Measure the opening width. If there is room, add at least 3″ to each side of the window opening for minimum light gap coverage and maximum privacy.

Measure the opening height. Add a minimum of 2 1/2″ in height (3″ for 2″ horizontal blinds) to allow space for mounting brackets above the opening plus enough overlap for the bottom. After determining the measurements that you want the blind to be, hold the tape measure up to your window and visualize what the overall size will look like on that window before proceeding.