Tracks and Poles
It’s a trick of the eye, but if there is enough wall space either side of the window, then add an extra 35-45cm to the length of the curtain pole. This way the Curtains sit wider than the window when pulled back, giving a bigger view of the outside. Another tip is to fit your curtains so they measure to the ceiling, so it gives the vision of a longer, taller window
Decide if you are co-ordinating patterns or colours? If it is the pattern that is the hero, then choose similar designs in different scales or pick out a single element in the curtain fabric and replicate it with the blind. If you choose to co-ordinate a colour palette, then choose a dominant colour from the curtain pattern and bring it through in the blind. Roman blinds are perfect for co-ordinating with curtains