I am not sure what would be the perfect range, I am not a scientist so I can't say if this much is good or that much is good but I would say do not care about what the law says, just stay as far away as possible.
When the law says 1 meter and you are closer, you are breaking the law and never do that, care about the law in that scenario, but if the law says 1 meter or 0.75 meter or whatever, and you keep 10 meters away from all humans (if you can) that is not caring about law and you should totally do that.
I do not care what the public says or what the scientists say, I am going to stay away 10x more than that for sure, I am just too scared to get it, I am still in shock how I managed to not get it so far. My closest friend is getting married soon, there will be 300 people in one place, I am very veeeryy afraid.
Social distancing is not possible all the time because not everyone have such luxury life style, people who are using public transport for their regular activity are highly affected due to these kind of protocols but now its a good thing they reduced it.Anyway keeping 3 meter even won't save us from corona spread so there is no use of having such 1 meter criteria for social distancing.