Only use a metal measuring tape for all measurements.
Inside Mount
Measure the exact width and length of the window opening. Factory will deduct 1/2" off the width of the shade for clearance. Please mark (IB) as inside tight measurement.
Outside Mount
Measure the exact width and length of the window opening you wish to cover. The shade should cover the window opening by at least 2" in both width and length. Please mark (OB) as outside mount.
