Your growth chart didn’t stop at the doorframe.

Pencil marks on a doorframe stop when your height does, and it is easy to absorb the idea that growing already happened to you. Most of the growth that matters has no measurement: patience, nerve, what you can carry without falling over, how well you read a room. None of it gets marked on a wall, so it goes unnoticed.

Invent your own measure and check it once a year. What would have flattened you two years ago and does not now. Write it down, because nobody else is keeping this particular record.