This batch of tumbled is medium to large, each piece measures approx. 3/4 " to 1 1/4". Properties:Psychic protection, cleanses aura, anti-stress, encourages organized thought,aids in learning, stimulates intuition, helps one get 'unblocked', aids in psychic communication. Uses: Put under your pillow, carry in a charm bag or pocket, hold while meditating, add to a jar candle spell.