How big do cattle get?

This all depends on the breed. The largest breed, being the Chianina, have often been known to weigh upwards of 2 tons (~4000 lbs). The smallest breed, the Dexter, will only grow to be as heavy as 1100 lb for bulls. The average weight for a Dexter bull is only around 900 lb.

Bulls are always going to be larger and weigh more than cows, and mature animals weigh more than younger ones.