How tall was a baby t Rex?

I have heard from one source that a T-rex hatchling was about the size of a chicken. Of course, the proportions are different, so I would guess that a T-rex hatchling was about 1 ft tall and perhaps 3 ft long.

T-rex young probably remained under 4,000 lbs until they reached 14 years of age. Then they grew an average of 1,300 pounds per year until they reached age 18, and then their growth would reach another plateau.