Bracket to bracket - Choose this option if you are replacing an existing blind which you have measured from bracket to bracket or if you have measured to the points where your brackets need to fit. The finished fabric with of the blind will be around 35mm narrower than the bracket to bracket measurement.
Fabric width - If you have measured the area which you want the fabric to cover, choose Fabric width as your measuring method. Also choose this method if you have measured the width of fabric on an existing blind. When choosing this method, please remember that the finished blind including brackets will be around 35mm wider than the fabric width.