A good posture

A good posture consists of a straight spine with light curve in the lower back, a free neck, relaxed shoulders, a soft belly, a casual gaze, hands with a few millimeters distance between the fingers (no holding of the hands), a dropped jaw with closed lips, weight on all points of the foot, flat shoulder blades and a tailbone pointing down towards a point in the middle of the two heels. It requires years of training to reach a good posture, or to be newly born. Anything in between those two points in a life time is bad posture.