Roman Blinds
First you must decide whether you require the blinds to sit inside or outside the window recess.
Inside the Window Recess
Measure length from the top to the bottom of the window recess.
When measuring the width of the recess take a measurement at the top, middle and bottom and take a note of the lowest measurement. This ensures that the blind will not snag when in use (D)
Outside the Window Recess
For length size, measure from the required position above the window down to the length required.
For width size measure the width of the window and add approimatley 10cm at each side of the window to allow an overlap (E)