Designed for the Median, Broken for the Margins: How Grip Research Exposes Mobile UI's Size Problem
Decades of HCI research on hand anthropometry and grip diversity have documented the wide spectrum of human hand sizes and capabilities—yet the mobile industry has persistently engineered interfaces around an idealized average user. The result is a design monoculture that systematically disadvantages tens of millions of Americans with smaller hands, reduced dexterity, or non-standard grip patterns. This retrospective examines what the research has long established and why it has so rarely transl