In reality, it does not matter whether you are tall or short, posture is of great importance.
At all times, hold your head up, shoulders and back straight, and walk with a steady, natural step. No head down and especially no hunched back when you walk.
A person who walks with their head held high, who is confident and exudes a lot of self-assurance will look taller. It is as if his greatness of spirit also reflected physical greatness.