It's possible you're thinking of a different horse, or perhaps you're mixing up the story with Samson from the Bible, who was known for his strength, not his height.
To answer your question about the tallest horses:
* The tallest horse ever recorded was a Shire named Sampson, who stood at 7 feet 2 inches (2.18 meters) tall.
* However, this record was unofficial and was not officially measured by the Guinness Book of World Records.
* The current record holder for the tallest horse is a Belgian Draft named Big Jake, who stands at 6 feet 4 inches (1.93 meters) tall. His height was officially measured by the Guinness Book of World Records.
Let me know if you have other questions about horses!