The query "how tall is" is incomplete and does not specify a subject or object for the height measurement. To provide a useful answer, additional context or a specific entity for which the height is requested is necessary. If you would like to know the height of a particular person, place, object, animal, or any other entity, please provide the full query or specify the subject. For example, you could ask "How tall is Mount Everest?", "How tall is the Eiffel Tower?", or "How tall is the average human male?" Let me know the complete question or subject, and I will find the precise height information for you.