The query is a bit unclear. If you’re asking “how tall is” in a general sense, height varies by person, age, and population. If you meant a specific person or group (e.g., average adult height in a country, or a child’s predicted adult height), please share the context and I’ll provide precise figures. Key points to consider:

• Adult average height differs by country and sex. For example, global averages tend to be in the range of roughly 160–175 cm for adults, with men often taller on average than women in many populations. If you specify a country and gender, I can give a precise figure.
• For children and teens, height is tracked against growth charts and percentiles, and there are dedicated calculators to estimate final adult height based on age, current height, parental heights, and other factors.
• “How tall is” can also refer to a specific object or structure; if that’s the case, name the object and I’ll provide the measurement.

If you can provide:

• The subject (person, country, or object),
• Any relevant details (age, sex, or the specific measurement you want),
  I’ll tailor the answer with exact numbers.