Research on normative thumb measurements highlights that while men generally have larger thumb girth and stronger grip strength, there are minimal differences in range of motion (ROM) compared to women.
In a review of The Legacy Trilogy by Cayla Kluver on Amazon, a reader noted they were surprised a teen author could produce something "this mature," giving it a definitive "thumbs up" for its emotional complexity and world-building. mature tumbs
Below is a review-style breakdown of how this "mature" quality is perceived across different categories: Design & Automotive Evolution mature tumbs