1. The inner self, the spirit of an individual.
2. Goals and ambitions, gauged by the ability to reach objectives.
3. Concern over knowing what to do with success (fear of heights).
Size in dreams represents importance.
The bigger something is, the more important and valuable it is to you. Dreams of something tall suggest that you are at the height of your -esteem and success.
If you are taller in your dream than you normally are, you are confident in your power, authority, and mastery.
If you are shorter in your dream than you normally are, then you are feeling a lack of confidence or importance. See Giant or Short.