You may have noticed that there are several hubers who have given you very good information about the sizes of rain drops, and my position that there is no need for me to write repeat information on the same data.
However, I will give you an interesting story. I live in Franklin, Tennessee which is a Civil War town (the Battle of Franklin, a very decisive war) was fought here.
I was lucky enough to be asked to work on the movie set of "The Last Castle," a movie that used Robert Redfort and out popular actors to make this prison movie.
Getting back to rain, real rain droplets are too small for the movie cameras to pick up well, so sprinkler systems were used to create the effects of rain, because droplets from the sprinkler system are much larger, allow the movie camera to "see" the droplets easier, for a much better effect.
I learned a lot working on this movie set which was a Graceworks production.