How To Draw Hands

The basic shapes of a hand are not perfectly square or parallel so it is easy to get them wrong. When spread, the fingers all point in different directions.

Because the fingers’ points of origin and lengths are different, the joints do not line up in a straight line.

Note that the thumb moves in a different direction than the rest of the fingers.
To make bending possible, the skin is relatively loose and thin at the joints.

The bending marks on the palm side do not necessarily line up with the joints.

These lines might not be visible in simple drawing styles, but knowing where they are and where the skin overlaps can help when drawing the fingers bent.