Aura is a Latin word which means a glow of light . Aura is itself an energy field around the body like a halo. There are seven auras belonging to seven subtle energy bodies.
It has been now proved scientifically that auras do exist. They can be visible with Kirilian photography.
The spiritual aura has a diameter of 15-18 feet, the mental aura of 8 feet and the etheric aura has a length of 8".
Auras overlap; we can see only etheric aura. It is seen as a translucent field having different colors and patterns. It is different in color, size, intensity from man to man depending upon his mental and emotional state.