How to Measure for Vertical Blinds

Tips Before You Get Started

Use a steel tape measure for the most accurate measurements
If you’re considering an Inside Mount, make sure your window has enough depth to accommodate it
Always measure width (left to right) first and height (top to bottom) second
Record all measurements to the closest 1/8”, making sure to clearly identify which is your height and which is your width—it is very common to get them mixed up

Determine Inside Mount or Outside Mount

Inside mount vertical blinds will hang entirely within the window frame

Neat, streamlined look
Usually best for energy efficiency

Outside mount vertical blinds will hang outside your window opening, overlapping the edges

We recommend outside mount for patio doors and sliding doors
Minimizes light gaps, giving you better light control and privacy
For an outside mount, be sure to allow for the height of the vertical blind’s headrail in your measurement

Measuring for Inside Mount

Note: Inside mount blinds will have a small deduction automatically applied by the manufacturer, to ensure proper fit

Width

Measure at the depth within the frame where you’ll install your brackets<
Measure width at the top of your window opening, from edge to edge<
Record the smallest measurement to the closest 1/8”

Height

Measure height at the left, center and right, from top edge to bottom edge
Record the shortest measurement of the three to the closest 1/8”

Measuring for Outside Mount

Note: Outside mount blinds will have no deductions taken at the factory. They will be made according to your exact measurements.

Width

Measure the area you want to cover (how far you want the blind to overlap the window opening); we recommend 6” on both sides
Record your measurement

Height

Determine where you want the top of your vertical blind to be and mark the spot
Measure the height from the spot you marked to the top of the window sill. If there is no sill, measure the entire length you want covered
Record your measurement