measure for: inside mount vertical blinds

1. Measure the opening across the top, where the headrail is to be installed, from inside of jamb on left to inside of jamb on right. Round the measurement down to the nearest 1/8".

2. Measure from the inside top of the opening on the left, at the center, and on the right to the sill; to the closest 1/8" and note the smallest dimension.

3. Do not make any allowances: the factory will make all adjustments so the headrail will fit the opening properly and the vanes will clear the sill by 1/4" to 1/2".

1. Measure the opening across the top, where the headrail is to be installed, from inside of jamb on left to inside of jamb on right. Round the measurement down to the nearest 1/8".

2. Measure from the inside top of the opening on the left, at the center, and on the right to the sill; to the closest 1/8" and note the smallest dimension.

3. Do not make any allowances: the factory will make all adjustments so the headrail will fit the opening properly and the vanes will clear the sill by 1/4" to 1/2".