To find width:
Measure exact distance to the nearest 1/8" between inside surfaces of window frame at the top, middle and bottom, and use the narrowest width. Do not make any width deductions.
To find length:
Measure exact distance from inside surface at top of window to sill. If you prefer blind not to touch sill, deduct 1/4". If there is no sill, measure length to point where shade is to reach. |