There are two recent popes named Leo relevant to your query:

• Pope Leo XIII (1878–1903): There is no available information in the search results about his height.
• Pope Leo XIV (elected in 2025, born Robert Francis Prevost): He is reported to be 5 feet 10 inches (178 cm) tall

Therefore, if you are asking about the current or recent Pope Leo, Pope Leo XIV is approximately 5'10" tall. There is no height data available for Pope Leo XIII in the provided sources.