How big to horsfield tortoise grow to?

Well there is a long story to this one, it starts way back a few million years ago when dinasaurs lived. One dinasaur was called the robert dinasaur it was the biggest dinasaur that had ever lived on this planet, it ate a t-rex like it was munch. He was so hardcore at eating other dinasaurs he had to eat turtles but turtles had hard shells so he had no clue on what to do. He decided to eat his leg for sum reason cos he is a downer and when he ate his leg he fell over and crushed a turtle called a horsefeild turtle, this tranfromed robert into Robert horsfeild and now he walks upon the Earth Day and night searching for food. He likes a girl called katy masih and he said he would kill anyone who touched her,so one day alvin hart decided to get it on with her and robert ate him , the end.