Summary

Niall Horan's Hairline scores 5.5, a middle reading that is higher than 20% of the men on the wiki. The measurement describes hairline shape, position, and pattern. Adam Brody, Alton Mason and Atsushi Sakurai share his exact score of 5.5, while Abraham Lincoln sits at the top with 10.0 and Rick Rubin at the bottom with 1.5. For a fuller picture, see Niall's Hair Length and Niall's Facial Hair, or his full Dimorphism breakdown.