How To Measure For Faux Roman Shades. Determine where you want the top of your roman shade to be and mark the spot. Extending the blinds outside the window will also provide the space needed for the mounts and help the window appear larger than it actually is.
Consider adding an extra 3 inches to the width and height for optimum light control and privacy. Extending the blinds outside the window will also provide the space needed for the mounts and help the window appear larger than it actually is. I first measured the inside of my window frame.
Use a steel measuring tape.
Place a step ladder close to and at the right angles to the window, with the front or the. Add 2 1/2″ at the bottom for the hem and add 3″ for header or however big you want it to be. Record the narrowest width of the 3 measurements down to the closest 1/8. Length should also be equal to the length of your window, plus 16 inches.) traverse cord or roman shade cord, two pieces.