By wide do you mean leaf span?
The blooming size growths on mine are probably about 15cm across. I wouldn't be surprised if they used to bloom on growths 2/3 this size when I used high K fert though.
Generally from the time I see a new stolon to when the growth gets to be big enough to bloom is only about a year.
I think they grow pretty fast from stolonous growths, but haven't tried to raise any from seed. I don't think it should take these guys more than 3 years from flask.