To find width: Measure exact distance between inside surfaces of window frame at the top, middle, and bottom, and use the narrowest width. Do not make any width deductions. Factory will automatically deduct 3/8" from fabric width.
To find height: Measure exact distance from inside surface at top of window to sill. If you prefer shade not to touch sill, deduct 1/4". If there is no sill, measure height to point where shade is to reach.
minimum mounting depth*
* Minimum mounting depth is the depth required, in the window frame, for the blind to be mounted inside mount.
measure for: outside mount roman shades
To find width: Measure exact distance between the outermost points where the shade is to be placed. This measurement should overlap each side of window frame by at least 1 1/2". Factory makes no deduction from your shade width dimension.
To find height: Measure exact distance from where top of shade will be located to top of sill. If there is no sill or if shade is to overlap window frame, measure to point shade is to reach.