Size of each rudraksha bead size is 8 mm in diameter.Rudraksha Mala Prayer Beads Japa Mala 108 + 1 Bead Blessed Religious Beads. Rudraksha mala is used to chant mantras to please Lord Shiva or Lord Vishnu and can be worn around the neck as necklace. Rudrkasha beads work as a protector against negativity and evil eye. It is also known as Purnamala becuase of the 108 beads this mala or rosary is made of as the number of beads has significance attached to it. Using this mala also lifts a person spiritually and reflects positive effect on ones health.