I didn't grow, but I didn't start on T until 25. My buddy, however, started his at 20, and swears he grew an inch & a half. I hit 5'6" at 18, and I'm still 5'6"... short, but there are plenty of guys who are shorter (natal guys). Only thing that sucks is my little brother, who's 18, is 6'5" and still growing, despite the fact that no one else in my family is over 6'3", and only 3 people in the entire extended family are over 6 feet tall. However, my feet did grow... at least one size, possibly two. I think it all really depends on your genes and age. If you're young, and people in your family tend to grow taller well into their 20s, I think you shouldn't have any problem.
SD