The width of the eco mat equals the width of the window recess plus e.g. 5cm for both side, which will allow for a 5 cm overlap on both sides of the recess.
The height of the eco mat - the height of the window recess + e.g. 5cm.
The above figures are just an example. You can choose any overlap measurement for width and height, provided the measurements are the same on both sides so that the eco mat sits symmetrically on the window recess.
Option 2 – eco mat fitted on the window frame
The width of the eco mat equals the width of the window pane + the width of both glazing beads (so that the window handle does not interfere with the operation of the eco mat).
The height of the eco mat - the height of the windowpane + the height of both glazing beads.
Remember: The width of the blind you provide includes the width of the mat + 4cm for the mechanism.