The diameter of the shungite sphere 5 cm. This area creates an energy field with a radius of about 0.8-1.5 m.
Shungite spheres are small spherical balls made from real shungite. They radiate energy in every direction, simultaneously. Likewise, they also come with the ability of moving energy through time. A shungite sphere is probably one of the best energy tools that you can use during your meditation. They act as one of the best purifiers for getting rid of the unnecessary energies and toxicities from both people and spaces. They act by grounding and healing our chakras while specifically emphasizing on the lower chakra. 
Shungite, , is a rare carbon-based and a non-crystalline rock that has the capacity to conduct electromagnetic and geothermal energy alongside protecting your body from the electromagnetic emissions caused by electronic appliances. Shungite spheres are used to protect from harmful electromagnetic radiation at work and at home. They relieve stress, neutralize emotional disturbances.  Shungite spheres are quite effective in the treatment of joints, asthma, disturbances of the nervous system, sciatica and varicose veins. It helps to improve blood circulation, eliminate pain in diseases of the joints and muscles.