When selecting "clamp mounting", the indicated measurements take into account mounting of the blind directly on the window pane. You must specify the dimensions of the window pane. The final width of the blind fabric will be approximately 4 cm wider than the window (2 cm on both sides) and the height is adjusted so that after mounting the blind on the window frame, the entire window can be covered.

If you'd like a custom height, please mention it in the comments section. The final width of the roller blind including the entire mechanism will be approximately 7.5 cm wider than the window itself. Make sure the fabric does not cover the latch (check that the distance between the glass and the latch is greater than 2 cm).