Step 1 be sure to measure accurately.
How to measure for window shades and blinds.
Make sure you hold both ends of the tape on the inside edges of the recess.
Measure the width start by measuring the width of your window inside the frame in 3 places top middle and bottom.
At the left middle and right side.
Measure the width of the recess in three places.
At the top at the middle and at the bottom.
How to measure for inside mount blinds and shades 1.
If the window is set in a deep recess fitting the blind inside makes for a neat finish.
2 measure the height inside the window opening from the top of the window opening to the window sill.
Across the top middle and bottom.
But mistakes in measurements can ruin them altogether step 2 measure for width.
Note the smallest measurement as it will be the one you use step 3 measure for height.
1 measure the width inside the window opening at the top and round down to the nearest 1 8 measurement.
Inside mount treatments are installed inside the window casing.
Measure the inside of the window frame in three places for width.
If your window does not have a sill measure to the point you would like the blind to reach.