The definition of 'giant' is highly subjective and the term can be used to describe a range of heights depending on the context. Generally speaking, giant is used to describe someone who is significantly taller than average, and the exact height can vary from region to region.
In the United States, a height of 6 feet (183 cm) or more is typically considered giant. In many countries, people over 6'5" (196 cm) are considered giants, while in some regions, people over 7 feet (213 cm) can be considered giants. In addition, some cultures may define giant as someone who is taller than the average for their population, even if they are not necessarily taller than 6 feet.
In sports, 'giant' is often used to describe a player who is much taller than their competitors, and this can vary from sport to sport. For example, in basketball a player over 7 feet (213 cm) might be considered a giant, while in volleyball, a player over 6 feet (183 cm) might be considered a giant.
In conclusion, there is no definitive answer to what height is considered giant, as it is highly subjective and can vary greatly depending on the context.