This tree is truely taking over our yard, it grows very fast, The biggest tree seems to be over 15 ft tall by 25 ft wide. It has also spawned other near by trees, the youngest is only about three years. There also seems to be to identification of very big leaves that are about 7 in by 5 in some are spade shaped and other are spade shaped with a niche on one side.
the really strange thing is is that If this is a "White Mulberry" I have never seen any berries growing on it???
It is usually dioecious, which means male and female flowers are on different trees, so you probably have a male tree.
A superficially similar one is paper mulberry (Broussonetia papyrifera), I can't swear yours is one or the other from these pictures (which do not enlarge for me) but if you check descriptions of both it will soon become apparent which you have.