It will be bigger, say up to 20 mm in length and average diameter of 15 mm. It has an oval shape with slightly flatter look. The two mukhi rudraksha is blessed by the Ardhanareeshwar form of Lord Shiva, representing Shiva and Shakti.
This rudraksha is useful for good family life, good relationships with all people and to get married. It is known to bring in unity of all kinds- between friends, husband and wife, father and son, father and son, buyer and seller. It is used for material gains as well as to attain nirvana and moksha. It is also known as Dev-Dev in view of its spiritual and material (dual purpose) characteristics.