Do I still need to take 20mm off my ceiling-to-floor measurement?

Older instructions used to ask customers to subtract a few millimetres. That step is no longer needed.

Note: Measure from the top of the track, or from the ceiling if you are top-fixing, straight down to the floor, and enter that figure as-is. If you want the curtains to just touch the floor, choose the 'No floor deduction' option when ordering.