5cm is the scale, the line under 5cm is equivalent to 5cm.
I stand corrected. So based on my non-scientific observation, the images seem to illustrate the effects about 15cm-25cm out. I would argue that most face to face interactions are at a greater distance (at least double), and even at the shown distance, it seems like even with the lowest quality mask there are very few droplets, if any, that reach the 25cm range.