Each crystal is individually packaged with a description card and detailed instructions on how to program and cleanse your stones. 

Medium = 3/4 inch to 7/8 inch long, by 1/2 inch to 1 inch wide.

Large = 1 & 1/8 inch to 1 & 1/4 inch long, by 3/4 inch to over 1 inch wide.

About Serpentine:
Serpentine is an earthing stone.  It strengthens meditation and spiritual exploration.  It clears the Chakras and stimulates the Crown Chakra, opening psychic abilities and helping you to understand the spiritual basis of life.  Serpentine helps you tap into spiritual wisdom as well as past life knowledge.  Serpentine also opens new pathways for the Kundalini energy to rise.

Serpentine helps you to feel more in control of your life.  It corrects mental and emotional imbalances and helps guide the conscious direction of healing energy towards problem areas.

Physically, Serpentine is extremely cleansing and detoxifying for the body and blood.  It is believed to promote longevity.