Approximately 1.9 inches. 
Sodalite brings order and calmness to the mind. It encourages rational thought, objectivity, truth and intuition, along with verbalisation of feelings. Sodalite brings emotional balance and calms panic attacks. It enhances self-esteem, self-acceptance and self-trust.
 
Sodalite also assists in the development of one's intuition. The stone’s high vibrations aid truth and will help you better understand yourself and what needs to be worked on. Being able to be in such a calm and reflective state will assist in pulling out the negativity within.