It is said that many males exceed 5.5 m in height. A record height for a giraffe in a UK zoo was 5.8 m, but the tip of his horns was said to have reached close

It is said that many males exceed 5.5 m in height. A record height for a giraffe in a UK zoo was 5.8 m, but the tip of his horns was said to have reached close to 6.1 m. So 6 m is about in this ballpark.