Also called: The canonical proportions · Jupiter-Apollo ratio · Index to ring comparison

Where on the hand: Judged on the back of the hand with the fingers pressed together and held straight. The palm side is misleading because the fingers are set at different heights on the palm.

What it looks like: Three dashed reference lines: one at the tip of Saturn, one at the middle of Saturn's nail phalange (the Jupiter/Apollo ideal), and one at the top crease of Apollo's first phalange (the Mercury ideal).

Everything is judged against the Saturn (middle) finger. Saturn should be longest by about half a phalange; Jupiter and Apollo should be roughly equal, each reaching the middle of Saturn's nail phalange; Mercury should reach the base of Apollo's nail phalange. Deviations from this baseline are what the whole finger reading is built on.

Western reading: Cheiro's benchmark is the equality of first and third fingers, which he considers the best sign of a balanced mind and genuinely rare.

The first and third fingers absolutely of equal length is the best sign of an equally balanced mind, but such a sign is rather rare to find.Cheiro, Palmistry for All (1916)