If you dream of seeing yourself taller than usual, it indicates an increase in your knowledge and resources. Particularly if you are an authoritative figure, it signifies an expansion of your power. For businesspeople, this dream symbolizes success and growth in your ventures. It may suggest positive changes in your life, bringing good news for your future.
From Imam Muhammad Ibn Seerin's Dictionary of Dreams According to Islamic Inner Traditions â entry "Size" (page 391) â resolved via the equivalent "Tallness" entry.
To see oneself taller than usual in a dream means increase in knowledge and wealth. If a man of authority sees that, it means expansion of his power. If he is a merchant, it means business prosperity. If one sees himself extremely tall and beyond the tallest human being in a dream, it means the nearing of his death, or it could mean his downfall. It is ominous for a tall person to see himself short in a dream, for it also denotes falling in rank, losing respect, or nearing one's death. Even seeing oneself shorter in a dream means death. If one sees his figure taller in a dream, it means that his authority will expand and he will win victory over his enemies. Tallness of one's figure in a dream also denotes longevity. If a short person sees himself tall in a dream, it denotes self-deception and boastfulness, or it could represent his stinginess. (Also see Figure)
Note: Islamic dream interpretation depends on the dreamer's circumstances and state. This is a general guide drawn directly from the source book.