Hello,
When selecting a “Fabric Width” Fitting Option it is recommended that this measurement type is used only when installing outside the window recess, where you know the exact width between the edges of the fabric cloth you wish to cover for the specific area. For reference, the overall size of the blind will be 35mm wider than the provided “Fabric Width” measurement, this is to accommodate the brackets and to allow the blind to operate freely when installed – please ensure you have the sufficient space to allow for the brackets.