Well, I don't know where you live, but it looks like cestrum nocturnum and here, in my area it will grow to 12' tall....
edited to add....
cestrum nocturnum is Night Blooming Jasmine, so that would be where your 'jasmine' part comes in and there may be dwarf forms with which I'm not familiar...likewise, there may also there may be other cestrums that are dwarf in nature...
