This is the measurement you need to make if the blind needs to fit inside the window recess.
Measure and mark the distance allowing for obstructions like handles that protrude into the recess area.We will make any necessary deductions to ensure the blind fits neatly within the recess of the window.
Use a metal tape measure, cloth ones can stretch and give you inaccurate measurements.
This is the measurement you need to take if you want your blind to fit outside the window recess, overlapping on all sides.
Measure the size of the recess, then add a little extra on all sides to ensure adequate coverage.
Measure the exact size of the area you would like the blind to overlap.Use a metal tape measure, cloth ones can stretch and give you inaccurate measurements.