Summary

Niall Horan's Interpupillary-Mouth Width Ratio measures 0.81x, scoring 9.7, and places him higher than 40% of the men on the wiki, though it sits below the ideal range of 0.83 to 0.87x. Among the closest matches, Alan Wilder, Alfredo De La Cruz and Andreas Erikson all share the same 0.81x value, while the wiki's highest reading belongs to Jack Ma at 1.12x and its lowest to Marty Feldman at 0.64x. The ratio compares mouth width with interpupillary distance, with an ideal of 0.85x indicating a mouth slightly narrower than eye spacing. Niall's Mouth Corner Position and Mouth width to nose width ratio add to his full Harmony breakdown.