Abstract: A system is provided for properly resizing a window shade to fit within a window frame adjacent a window. At least one ruler strip is provided with visible graduations thereon. Indicia are provided adjacent at least some of the graduations. The indicia are descriptive of a width of a window frame in which the window shade will fit when the window shade is cut at the graduation adjacent to that indicia. A position of the graduations and the corresponding indicia are misdescriptive of a width of the window shade so that clearance around the perimeter of the window shade and cutting of both edges of the window shade are accommodated. Both rectangular window shade and arched window shade sizing systems are provided. A retainer is also provided for holding and guiding of a cutting tool during cutting of the window shade for proper resizing.

Abstract: An assembly shades an arched window. The assembly includes a shade portion preferably in the form of a pleated shade extending between a first end and a second end. The ends of the shade are positioned so that the shade portion takes on a fanned configuration of semi-circular form similar to that of the arched window. A retainer acts as a support to hold the shade in a vertical orientation adjacent the window. The retainer includes a guide in the form of at least one panel extending up from a base resting upon a sill below the window. The panel buttresses the shade by contacting an intermediate portion of the shade between ends thereof to keep the shade in the vertical orientation shading the arched window.