I would like to order faux wooden blinds for a recess window. The width of the window is 153cm with a drop of 204cms. However the bottom 10 cms of the window drop has a skirting board on either side. Would I need to order the full 153cms width and 204cms drop or can I arrange for the bottom 10cms of the blind to be 149cms wide. Or will I need to adjust myself once I received the blind. Thank you so much xxx