So what do the shapes in the image actually represent and what can your thumb really tell you?

First, Look at What the Image Is Showing

The graphic presents several illustrations of a thumb viewed from the side.

Some appear to have a relatively straight thumb.

Others show a thumb that bends backward at the joint.

The illustrations also compare the apparent proportions of different sections of the thumb.

Letters A, B, and C show different relationships between the thumb and the reference lines beside them, while D and E illustrate different degrees or directions of thumb movement.

The image then suggests that each variation corresponds to a particular personality.

This kind of classification is commonly seen in viral palm-reading and body-language content.

But there is a problem:

A person’s thumb shape is determined primarily by anatomy—not by their personality.

Your Thumb Is a Complex Piece of Anatomy

The thumb may look simple, but it performs an extraordinary number of tasks.