I got my first tattoo when i was 16, and almost fully grown in height, its was my the phoenix city symbol on my forearm right below the elbow joint. It hasnt stretched at all. my younger cousin is 16, 5’3 and really wants one bad. His only concern was the fact that as he grows (our whole family grows late) that the tattoo would stretch. He said he wanted his initials running vertically on his calf. I didnt know the answer, and decided its time for me to join a tattoo forum. Im kinda new here, and would really appreciate all the feedback i can get.