It works best when the hair has grown back 1-2mm. I go over it every 2-3 days. Anything over 4 days is rather unpleasant, so I go over with the trimmer to 0.8mm beforehand.

So to your question; a few cm is of course not possible.

Otherwise, I can recommend the device to you, it's super practical and quickly finished without reddening.

Also works after a week. However, remove the head a few times and empty it briefly, then simply put it back on without any major cleaning and continue. Of course, it is best after 2-3 days.