As long as you are feeding him well enough, he should grow possibly up to 4 feet within the first year if fed properly.
How big is your monitor & what is his age?
Mirage came out of brumation on April 26. He was doing great. On May 2 he started acting funny. We just redid his tank, and he keeps going into one of his hides. He just lays there. He shows no intrest in food. HELP!