How to Measure Your 2D:4D Finger Ratio - Step-by-Step Guide #2024243 (License: Personal Use)

This instructional graphic demonstrates measuring the 2D:4D digit ratio by straightening the hand, identifying the crease at the base of the index and ring fingers, selecting the crease closest to the palm, marking it with a pen, and measuring from that point to the fingertip of each finger. It contrasts a high ratio (index longer than ring) with a low ratio (ring longer than index), highlighting anatomical landmarks for accuracy.

Used in health, anthropology, or psychology articles discussing prenatal testosterone exposure, behavioral traits, or sports performance correlations; serves users seeking self-assessment tools or educational content on biological markers.