The Element of your hand is a reflection of the element you are strongest in. This is also why often hands will be a ‘mix’ of what is seen above.
The earth hand shape being a wide palm shows the person is naturally practical, good at making things, handiwork, etc. the shorter and thicker fingers show that their creations are purposeful, steady and realistic. Water hands are naturally delicate and thin, as well as more elongated, showing gentleness and the flow of the water element. Water hands are usually better for soft expression like gracefulness and depth.
Air hands can sometimes evidently resemble spiders. Since spiders are fast/quick, it shows how the person often can’t make up their minds, have a lot of energy and show a lot of emphasis in movement.
The fire hand had a wider palm like the earth hand, but longer fingers. It shows practicality once again- the desire to ‘do things’ and have action. But the longer and thinner fingers than the earth hands show how they are more expressive in a passionate way, like air or water.